Techniques for user equipment antenna prioritization

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may establish a first communication link using a first radio access technology (RAT). The UE may establish a second communication link using a second RAT. The UE may determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT. The UE may prioritize antenna selection for the first communication link or the second communication link based at least in part on the determination. Numerous other aspects are provided.

CROSS-REFERENCE TO RELATED APPLICATION

This Patent application claims priority to U.S. Provisional PatentApplication No. 62/706,664, filed on Sep. 2, 2020, entitled “TECHNIQUESFOR USER EQUIPMENT ANTENNA PRIORITIZATION,” and to U.S. ProvisionalPatent Application No. 63/200,279, filed on Feb. 26, 2021, entitled“TECHNIQUES FOR USER EQUIPMENT ANTENNA PRIORITIZATION,” which areassigned to the assignee hereof. The disclosures of the priorApplications are considered part of and are incorporated by referenceinto this Patent Application.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wirelesscommunication and to techniques and apparatuses for user equipmentantenna prioritization.

DESCRIPTION OF RELATED ART

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency-division multipleaccess (FDMA) systems, orthogonal frequency-division multiple access(OFDMA) systems, single-carrier frequency-division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless network may include a number of base stations (BSs) that cansupport communication for a number of user equipment (UEs). A UE maycommunicate with a BS via the downlink and uplink. “Downlink” (orforward link) refers to the communication link from the BS to the UE,and “uplink” (or reverse link) refers to the communication link from theUE to the BS. As will be described in more detail herein, a BS may bereferred to as a Node B, a gNB, an access point (AP), a radio head, atransmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or thelike.

The above multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent user equipment to communicate on a municipal, national,regional, and even global level. NR, which may also be referred to as5G, is a set of enhancements to the LTE mobile standard promulgated bythe 3GPP. NR is designed to better support mobile broadband Internetaccess by improving spectral efficiency, lowering costs, improvingservices, making use of new spectrum, and better integrating with otheropen standards using orthogonal frequency division multiplexing (OFDM)with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDMand/or SC-FDM (e.g., also known as discrete Fourier transform spreadOFDM (DFT-s-OFDM)) on the uplink (UL), as well as supportingbeamforming, multiple-input multiple-output (MIMO) antenna technology,and carrier aggregation. As the demand for mobile broadband accesscontinues to increase, further improvements in LTE, NR, and other radioaccess technologies remain useful.

SUMMARY

In some aspects, a method of wireless communication performed by a userequipment (UE) includes establishing a first communication link using afirst radio access technology (RAT); establishing a second communicationlink using a second RAT; determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT; and prioritizing antennaselection for the first communication link or the second communicationlink based at least in part on the determination.

In some aspects, the method includes operating in a standalone mode onthe first communication link using the first RAT wherein establishingthe second communication link comprises establishing the secondcommunication link using the second RAT to establish a dual connectivityconfiguration; and wherein determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT as an initial configuration for the dual connectivityconfiguration; establishing the second communication link comprisesestablishing the second communication link using the second RAT toestablish a dual connectivity configuration; and determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises determining to prioritize antenna selection for the firstcommunication link using the first RAT as an initial configuration forthe dual connectivity configuration. In some aspects, the dualconnectivity configuration comprises an Evolved Universal MobileTelecommunications System Terrestrial Radio Access Network (E-UTRAN) NRdual connectivity (ENDC) configuration, or the dual connectivityconfiguration comprises a New Radio dual connectivity (NRDC)configuration.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT based atleast in part on one or more antenna prioritization parameters. In someaspects, determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises determining to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that at least a subset of the one ormore antenna prioritization parameters are satisfied.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the second communication link using thesecond RAT based at least in part on a determination that at least asubset of the one or more antenna prioritization parameters are notsatisfied.

In some aspects, the one or more antenna prioritization parametersinclude at least one of: a service type associated with the firstcommunication link, a signal measurement associated with the firstcommunication link, or a difference in signal measurements between atransmit antenna for the first communication link and a non-transmitantenna for the first communication link. In some aspects, determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on theservice type associated with the first communication link being a voiceover Long Term Evolution (VoLTE) service or a voice over New Radio(VoNR) service.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that the signalmeasurement associated with the first communication link does notsatisfy a threshold. In some aspects, determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT comprisesdetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thatthe signal measurement associated with the first communication linksatisfies a threshold.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that the differencein signal measurements between the transmit antenna for the firstcommunication link and the non-transmit antenna for the firstcommunication link satisfies a threshold. In some aspects, determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises determining to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the difference in signal measurements between thetransmit antenna for the first communication link and the non-transmitantenna for the first communication link does not satisfy a threshold.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT; and wherein the method further comprises: selecting a firsttransmit antenna, of a plurality of antennas of the UE, for the firstcommunication link; and selecting a second transmit antenna, of theplurality of antennas, for the second communication link, afterselecting the first transmit antenna for the first communication link.In some aspects, selecting the first transmit antenna for the firstcommunication link comprises selecting, as the first transmit antenna, apreferred transmit antenna for the first communication link.

In some aspects, selecting the second transmit antenna for the secondcommunication link after selecting the first transmit antenna for thefirst communication comprises selecting, as the second transmit antenna,a remaining antenna of the plurality of antennas for the firstcommunication link, wherein the remaining antenna is different from thepreferred transmit antenna. In some aspects, the method includesdetermining a sounding reference signal (SRS) alternative path for thesecond transmit antenna; and determining a blanking mask for the firstcommunication link on the first transmit antenna based at least in parton the SRS alternative path for the second transmit antenna. In someaspects, the method includes refraining from switching antenna selectionpriority between the first communication link and the secondcommunication link for a configured time period from determining toprioritize antenna selection for the first communication link.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the second communication link using thesecond RAT; and wherein the method further comprises: selecting a firsttransmit antenna of the plurality of antennas of the UE for the secondRAT; and selecting a second transmit antenna of the plurality ofantennas for the first RAT after selecting the second transmit antennafor the second RAT. In some aspects, selecting the first transmitantenna for the second communication link comprises selecting, as thefirst transmit antenna, a preferred transmit antenna for the secondcommunication link.

In some aspects, selecting the second transmit antenna for the firstcommunication link after selecting the first transmit antenna for thesecond communication link comprises selecting, as the second transmitantenna, a remaining antenna of the plurality of antennas for the secondcommunication link, wherein the remaining antenna is different from thepreferred transmit antenna. In some aspects, the method includesdetermining an SRS alternative path for the second transmit antenna; anddetermining a blanking mask for the first communication link on thefirst transmit antenna based at least in part on the SRS alternativepath for the second transmit antenna. In some aspects, the methodincludes refraining from switching antenna selection priority betweenthe first communication link and the second communication link for aconfigured time period from determining to prioritize antenna selectionfor the second communication link. In some aspects, the first RATcomprises a Long Term Evolution (LTE) RAT, wherein the second RATcomprises a New Radio (NR) RAT. In some aspects, the first RAT and thesecond RAT share a radio frequency (RF) front-end of the UE.

In some aspects, determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that a secondhighest reference signal received power (RSRP) measurement associatedwith the first communication link does not satisfy a threshold. In someaspects, determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises determining to prioritize antennaselection for the second communication link using the second RAT basedat least in part on a determination that a second highest RSRPmeasurement associated with the first communication link satisfies athreshold.

In some aspects, a UE for wireless communication includes a memory; andone or more processors coupled to the memory, the memory and the one ormore processors configured to: establish a first communication linkusing a first RAT; establish a second communication link using a secondRAT; determine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT; and prioritize antenna selection for the firstcommunication link or the second communication link based at least inpart on the determination.

In some aspects, the one or more processors are further configured tooperate in a standalone mode on the first communication link using thefirst RAT; wherein the one or more processors, when establishing thesecond communication link, are configured to establish the secondcommunication link using the second RAT to establish a dual connectivityconfiguration; and wherein the one or more processors, when determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT, are configured to determine to prioritize antenna selection for thefirst communication link using the first RAT as an initial configurationfor the dual connectivity configuration.

In some aspects, the dual connectivity configuration comprises an ENDCconfiguration or an NRDC configuration. In some aspects, the one or moreprocessors, when determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT, are configured to determinewhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT based at least in part on one or more antenna prioritizationparameters. In some aspects, the one or more processors, whendetermining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, are configured to determine to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that at least a subset of the one ormore antenna prioritization parameters are satisfied.

In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that at least a subset of the one or more antennaprioritization parameters are not satisfied. In some aspects, the one ormore antenna prioritization parameters include at least one of: aservice type associated with the first communication link, a signalmeasurement associated with the first communication link, or adifference in signal measurements between a transmit antenna for thefirst communication link and a non-transmit antenna for the firstcommunication link.

In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on theservice type associated with the first communication link being a VoLTEservice or a VoNR service. In some aspects, the one or more processors,when determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, are configured to determine to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that the signal measurement associatedwith the first communication link does not satisfy a threshold.

In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link satisfies a threshold. In some aspects, the one ormore processors, when determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT, are configured todetermine to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on a determination thatthe difference in signal measurements between the transmit antenna forthe first communication link and the non-transmit antenna for the firstcommunication link satisfies a threshold.

In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the difference in signal measurements between thetransmit antenna for the first communication link and the non-transmitantenna for the first communication link does not satisfy a threshold.In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the firstcommunication link using the first RAT; and wherein the one or moreprocessors are further configured to: select a first transmit antenna,of a plurality of antennas of the UE, for the first communication link;and select a second transmit antenna, of the plurality of antennas, forthe second communication link, after selecting the first transmitantenna for the first communication link.

In some aspects, the one or more processors, when selecting the firsttransmit antenna for the first communication link, are configured toselect, as the first transmit antenna, a preferred transmit antenna forthe first communication link. In some aspects, the one or moreprocessors, when selecting the second transmit antenna for the secondcommunication link after selecting the first transmit antenna for thefirst communication, are configured to select, as the second transmitantenna, a remaining antenna of the plurality of antennas for the firstcommunication link, wherein the remaining antenna is different from thepreferred transmit antenna.

In some aspects, the one or more processors are further configured todetermine a SRS alternative path for the second transmit antenna; anddetermine a blanking mask for the first communication link on the firsttransmit antenna based at least in part on the SRS alternative path forthe second transmit antenna. In some aspects, the one or more processorsare further configured to refrain from switching antenna selectionpriority between the first communication link and the secondcommunication link for a configured time period from determining toprioritize antenna selection for the first communication link.

In some aspects, the one or more processors, when determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the secondcommunication link using the second RAT; and wherein the one or moreprocessors are further configured to select a first transmit antenna ofa plurality of antennas of the UE for the second RAT; and select asecond transmit antenna of the plurality of antennas for the first RATafter selecting the second transmit antenna for the second RAT. In someaspects, the one or more processors, when selecting the first transmitantenna for the second communication link, are configured to select, asthe first transmit antenna, a preferred transmit antenna for the secondcommunication link.

In some aspects, the one or more processors, when selecting the secondtransmit antenna for the first communication link after selecting thefirst transmit antenna for the second communication link, are configuredto select, as the second transmit antenna, a remaining antenna of theplurality of antennas for the second communication link, wherein theremaining antenna is different from the preferred transmit antenna. Insome aspects, the one or more processors are further configured to:determine an SRS alternative path for the second transmit antenna; anddetermine a blanking mask for the first communication link on the firsttransmit antenna based at least in part on the SRS alternative path forthe second transmit antenna.

In some aspects, the one or more processors are further configured torefrain from switching antenna selection priority between the firstcommunication link and the second communication link for a configuredtime period from determining to prioritize antenna selection for thesecond communication link. In some aspects, the first RAT comprises anLTE RAT; wherein the second RAT comprises an NR RAT. In some aspects,the first RAT and the second RAT share an RF front-end of the UE.

In some aspects, the one or more processors, to determine whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, areconfigured to determine to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that a second highest RSRP measurement associated with thefirst communication link does not satisfy a threshold. In some aspects,determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT includes determining to prioritize antennaselection for the second communication link using the second RAT basedat least in part on a determination that a second highest RSRPmeasurement associated with the first communication link satisfies athreshold.

In some aspects, a non-transitory computer-readable medium storing a setof instructions for wireless communication includes one or moreinstructions that, when executed by one or more processors of a UE,cause the UE to: establish a first communication link using a first RAT;establish a second communication link using a second RAT; determinewhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT; and prioritize antenna selection for the first communication linkor the second communication link based at least in part on thedetermination.

In some aspects, the one or more instructions further cause the UE tooperate in a standalone mode on the first communication link using thefirst RAT; wherein the one or more instructions, that cause the UE toestablish the second communication link, cause the UE to establish thesecond communication link using the second RAT to establish a dualconnectivity configuration; and wherein the one or more instructions,that cause the UE to determine whether to prioritize antenna selectionfor the first communication link using the first RAT or the secondcommunication link using the second RAT, cause the UE to determine toprioritize antenna selection for the first communication link using thefirst RAT as an initial configuration for the dual connectivityconfiguration.

In some aspects, the dual connectivity configuration comprises an ENDCconfiguration or an NRDC configuration. In some aspects, the one or moreinstructions, that cause the UE to determine whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT, cause the UE todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT based at least in part on one or more antennaprioritization parameters.

In some aspects, the one or more instructions, that cause the UE todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, cause the UE to determine to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that at least a subset of the one ormore antenna prioritization parameters are satisfied. In some aspects,the one or more instructions, that cause the UE to determine whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT, causethe UE to determine to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that at least a subset of the one or more antennaprioritization parameters are not satisfied.

In some aspects, the one or more antenna prioritization parametersinclude at least one of: a service type associated with the firstcommunication link, a signal measurement associated with the firstcommunication link, or a difference in signal measurements between atransmit antenna for the first communication link and a non-transmitantenna for the first communication link. In some aspects, the one ormore instructions, that cause the UE to determine whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT, cause the UE todetermine to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on the service typeassociated with the first communication link being a VoLTE service or aVoNR service.

In some aspects, the one or more instructions, that cause the UE todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, cause the UE to determine to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that the signal measurement associatedwith the first communication link does not satisfy a threshold. In someaspects, the one or more instructions, that cause the UE to determinewhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT, cause the UE to determine to prioritize antenna selection for thesecond communication link using the second RAT based at least in part ona determination that the signal measurement associated with the firstcommunication link satisfies a threshold.

In some aspects, the one or more instructions, that cause the UE todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, cause the UE to determine to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that the difference in signalmeasurements between the transmit antenna for the first communicationlink and the non-transmit antenna for the first communication linksatisfies a threshold. In some aspects, the one or more instructions,that cause the UE to determine whether to prioritize antenna selectionfor the first communication link using the first RAT or the secondcommunication link using the second RAT, cause the UE to determine toprioritize antenna selection for the second communication link using thesecond RAT based at least in part on a determination that the differencein signal measurements between the transmit antenna for the firstcommunication link and the non-transmit antenna for the firstcommunication link does not satisfy a threshold.

In some aspects, the one or more instructions, that cause the UE todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, cause the UE to determine to prioritize antennaselection for the first communication link using the first RAT; andwherein the one or more instructions, when executed by the one or moreprocessors, further cause the UE to select a first transmit antenna, ofa plurality of antennas of the UE, for the first communication link; andselect a second transmit antenna, of the plurality of antennas, for thesecond communication link, after selecting the first transmit antennafor the first communication link. In some aspects, the one or moreinstructions, that cause the UE to select the first transmit antenna forthe first communication link, cause the UE to select, as the firsttransmit antenna, a preferred transmit antenna for the firstcommunication link.

In some aspects, the one or more instructions, that cause the UE toselect the second transmit antenna for the second communication linkafter selecting the first transmit antenna for the first communication,cause the UE to select, as the second transmit antenna, a remainingantenna of the plurality of antennas for the first communication link,wherein the remaining antenna is different from the preferred transmitantenna. In some aspects, the one or more instructions further cause theUE to determine an SRS alternative path for the second transmit antenna;and determine a blanking mask for the first communication link on thefirst transmit antenna based at least in part on the SRS alternativepath for the second transmit antenna.

In some aspects, the one or more instructions further cause the UE torefrain from switching antenna selection priority between the firstcommunication link and the second communication link for a configuredtime period from determining to prioritize antenna selection for thefirst communication link. In some aspects, the one or more instructions,that cause the UE to determine whether to prioritize antenna selectionfor the first communication link using the first RAT or the secondcommunication link using the second RAT, cause the UE to determine toprioritize antenna selection for the second communication link using thesecond RAT; and wherein the one more processors, when executed by theone or more processors, further cause the UE to select a first transmitantenna of a plurality of antennas for the UE for the second RAT; andselect a second antenna of the plurality of antennas transmit antennafor the first RAT after selecting the second transmit antenna for thesecond RAT.

In some aspects, the one or more instructions, that cause the UE toselect the first transmit antenna for the second communication link,cause the UE to select, as the first transmit antenna, a preferredtransmit antenna for the second communication link. In some aspects, theone or more instructions, that cause the UE to select the secondtransmit antenna for the first communication link after selecting thefirst transmit antenna for the second communication link, cause the UEto select, as the second transmit antenna, a remaining antenna of theplurality of antennas for the second communication link, wherein theremaining antenna is different from the preferred transmit antenna.

In some aspects, the one or more instructions further cause the UE to:determine an SRS alternative path for the second transmit antenna; anddetermine a blanking mask for the first communication link on the firsttransmit antenna based at least in part on the SRS alternative path forthe second transmit antenna. In some aspects, the one or moreinstructions further cause the UE to refrain from switching antennaselection priority between the first communication link and the secondcommunication link for a configured time period from determining toprioritize antenna selection for the second communication link. In someaspects, the first RAT comprises an LTE RAT; wherein the second RATcomprises an NR RAT. In some aspects, the first RAT and the second RATshare an RF front-end of the UE.

In some aspects, the one or more instructions, that cause the one ormore processors to determine whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT, cause the one or moreprocessors to determine to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that a second highest RSRP measurement associated with thefirst communication link does not satisfy a threshold. In some aspects,the one or more instructions, that cause the one or more processors todetermine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT, cause the one or more processors to determine toprioritize antenna selection for the second communication link using thesecond RAT based at least in part on a determination that a secondhighest RSRP measurement associated with the first communication linksatisfies a threshold.

In some aspects, an apparatus for wireless communication includes meansfor establishing a first communication link using a first RAT; means forestablishing a second communication link using a second RAT; means fordetermining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT; and means for prioritizing antenna selection forthe first communication link or the second communication link based atleast in part on the determination.

In some aspects, the apparatus includes means for operating in astandalone mode on the first communication link using the first RAT;wherein the means for establishing the second communication linkcomprises means for establishing the second communication link using thesecond RAT to establish a dual connectivity configuration; and whereinthe means for determining whether to prioritize antenna selection forthe first communication link using the first RAT or the secondcommunication link using the second RAT comprises means for determiningto prioritize antenna selection for the first communication link usingthe first RAT as an initial configuration for the dual connectivityconfiguration. The means for establishing the second communication linkcomprises means for establishing the second communication link using thesecond RAT to establish a dual connectivity configuration; and the meansfor determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT comprises means for determining to prioritizeantenna selection for the first communication link using the first RATas an initial configuration for the dual connectivity configuration.

In some aspects, the dual connectivity configuration comprises an ENDCconfiguration or an NRDC configuration. In some aspects, the means fordetermining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT comprises means for determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RAT based atleast in part on one or more antenna prioritization parameters. In someaspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on a determination thatat least a subset of the one or more antenna prioritization parametersare satisfied.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thatat least a subset of the one or more antenna prioritization parametersare not satisfied. In some aspects, the one or more antennaprioritization parameters include at least one of: a service typeassociated with the first communication link, a signal measurementassociated with the first communication link, or a difference in signalmeasurements between a transmit antenna for the first communication linkand a non-transmit antenna for the first communication link.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on the service typeassociated with the first communication link being a VoLTE service or aVoNR service. In some aspects, the means for determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises means for determining to prioritize antenna selection for thefirst communication link using the first RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link does not satisfy a threshold.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thatthe signal measurement associated with the first communication linksatisfies a threshold. In some aspects, the means for determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises means for determining to prioritize antenna selection forthe first communication link using the first RAT based at least in parton a determination that the difference in signal measurements betweenthe transmit antenna for the first communication link and thenon-transmit antenna for the first communication link satisfies athreshold.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thatthe difference in signal measurements between the transmit antenna forthe first communication link and the non-transmit antenna for the firstcommunication link does not satisfy a threshold. In some aspects, themeans for determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises means for determining to prioritizeantenna selection for the first communication link using the first RAT;and wherein the apparatus further comprises: means for selecting a firsttransmit antenna, of a plurality of antennas of the UE, for the firstcommunication link; and means for selecting a second transmit antenna,of the plurality of antennas, for the second communication link, afterselecting the first transmit antenna for the first communication link.

In some aspects, the means for selecting the first transmit antenna forthe first communication link comprises means for selecting, as the firsttransmit antenna, a preferred transmit antenna for the firstcommunication link. In some aspects, the means for selecting the secondtransmit antenna for the second communication link after selecting thefirst transmit antenna for the first communication comprises means forselecting, as the second transmit antenna, a remaining antenna of theplurality of antennas for the first communication link, wherein theremaining antenna is different from the preferred transmit antenna.

In some aspects, the apparatus includes means for determining an SRSalternative path for the second transmit antenna; and means fordetermining a blanking mask for the first communication link on thefirst transmit antenna based at least in part on the SRS alternativepath for the second transmit antenna. In some aspects, the apparatusincludes means for refraining from switching antenna selection prioritybetween the first communication link and the second communication linkfor a configured time period from determining to prioritize antennaselection for the first communication link.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the second communicationlink using the second RAT; and wherein the apparatus further comprisesmeans for selecting a first transmit antenna of a plurality of antennasof the apparatus for the second RAT; and means for selecting a secondtransmit antenna of the plurality of antennas for the first RAT afterselecting the second transmit antenna for the second RAT. In someaspects, the means for selecting the first transmit antenna for thesecond communication link comprises means for selecting, as the firsttransmit antenna, a preferred transmit antenna for the secondcommunication link.

In some aspects, the means for selecting the second transmit antenna forthe first communication link after selecting the first transmit antennafor the second communication link comprises means for selecting, as thesecond transmit antenna, a remaining antenna of the plurality ofantennas for the second communication link, wherein the remainingantenna is different from the preferred transmit antenna. In someaspects, the apparatus includes means for determining an SRS alternativepath for the second transmit antenna; and means for determining ablanking mask for the first communication link on the first transmitantenna based at least in part on the SRS alternative path for thesecond transmit antenna.

In some aspects, the apparatus includes means for refraining fromswitching antenna selection priority between the first communicationlink and the second communication link for a configured time period fromdetermining to prioritize antenna selection for the second communicationlink. In some aspects, the first RAT comprises an LTE RAT; wherein thesecond RAT comprises an NR RAT. In some aspects, the first RAT and thesecond RAT share an RF front-end of the UE.

In some aspects, the means for determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises means fordetermining to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on a determination thata second highest RSRP measurement associated with the firstcommunication link does not satisfy a threshold. In some aspects, themeans for determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises means for determining to prioritizeantenna selection for the second communication link using the second RATbased at least in part on a determination that a second highest RSRPmeasurement associated with the first communication link satisfies athreshold.

Aspects generally include a method, apparatus, system, computer programproduct, non-transitory computer-readable medium, user equipment, basestation, wireless communication device, and/or processing system assubstantially described herein with reference to and as illustrated bythe drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. Each of the figures is provided for the purposesof illustration and description, and not as a definition of the limitsof the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can beunderstood in detail, a more particular description, briefly summarizedabove, may be had by reference to aspects, some of which are illustratedin the appended drawings. It is to be noted, however, that the appendeddrawings illustrate only certain typical aspects of this disclosure andare therefore not to be considered limiting of its scope, for thedescription may admit to other equally effective aspects. The samereference numbers in different drawings may identify the same or similarelements.

FIG. 1 is a diagram illustrating an example of a wireless network, inaccordance with the present disclosure.

FIG. 2 is a diagram illustrating an example of a base station incommunication with a user equipment (UE) in a wireless network, inaccordance with the present disclosure.

FIG. 3 is a diagram illustrating an example of dual connectivity, inaccordance with the present disclosure.

FIG. 4 is a diagram illustrating an example of a set of radio frequency(RF) chains of a UE, in accordance with the present disclosure.

FIG. 5 is a diagram illustrating one or more examples associated with UEantenna prioritization, in accordance with the present disclosure.

FIG. 6 is a diagram illustrating examples of transmit/receive blanking,in accordance with the present disclosure.

FIG. 7 is a diagram illustrating an example process associated with UEantenna prioritization, in accordance with the present disclosure.

FIGS. 8 and 9 are block diagrams of example apparatuses for wirelesscommunication, in accordance with the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based on theteachings herein one skilled in the art should appreciate that the scopeof the disclosure is intended to cover any aspect of the disclosuredisclosed herein, whether implemented independently of or combined withany other aspect of the disclosure. For example, an apparatus may beimplemented or a method may be practiced using any number of the aspectsset forth herein. In addition, the scope of the disclosure is intendedto cover such an apparatus or method which is practiced using otherstructure, functionality, or structure and functionality in addition toor other than the various aspects of the disclosure set forth herein. Itshould be understood that any aspect of the disclosure disclosed hereinmay be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, or the like(collectively referred to as “elements”). These elements may beimplemented using hardware, software, or combinations thereof. Whethersuch elements are implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem.

It should be noted that while aspects may be described herein usingterminology commonly associated with a 5G or NR radio access technology(RAT), aspects of the present disclosure can be applied to other RATs,such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

FIG. 1 is a diagram illustrating an example of a wireless network 100,in accordance with the present disclosure. The wireless network 100 maybe or may include elements of a 5G (NR) network and/or an LTE network,among other examples. The wireless network 100 may include a number ofbase stations 110 (shown as BS 110 a, BS 110 b, BS 110 c, and BS 110 d)and other network entities. A base station (BS) is an entity thatcommunicates with user equipment (UEs) and may also be referred to as anNR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmitreceive point (TRP), or the like. Each BS may provide communicationcoverage for a particular geographic area. In 3GPP, the term “cell” canrefer to a coverage area of a BS and/or a BS subsystem serving thiscoverage area, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or another type of cell. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription. Apico cell may cover a relatively small geographic area and may allowunrestricted access by UEs with service subscription. A femto cell maycover a relatively small geographic area (e.g., a home) and may allowrestricted access by UEs having association with the femto cell (e.g.,UEs in a closed subscriber group (CSG)). ABS for a macro cell may bereferred to as a macro BS. ABS for a pico cell may be referred to as apico BS. A BS for a femto cell may be referred to as a femto BS or ahome BS. In the example shown in FIG. 1 , a BS 110 a may be a macro BSfor a macro cell 102 a, a BS 110 b may be a pico BS for a pico cell 102b, and a BS 110 c may be a femto BS for a femto cell 102 c. A BS maysupport one or multiple (e.g., three) cells. The terms “eNB”, “basestation”, “NR BS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” maybe used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of amobile BS. In some aspects, the BSs may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in thewireless network 100 through various types of backhaul interfaces, suchas a direct physical connection or a virtual network, using any suitabletransport network.

Wireless network 100 may also include relay stations. A relay station isan entity that can receive a transmission of data from an upstreamstation (e.g., a BS or a UE) and send a transmission of the data to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that can relay transmissions for other UEs. In the example shown inFIG. 1 , a relay BS 110 d may communicate with macro BS 110 a and a UE120 d in order to facilitate communication between BS 110 a and UE 120d. A relay BS may also be referred to as a relay station, a relay basestation, a relay, or the like.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, such as macro BSs, pico BSs, femto BSs, relay BSs, orthe like. These different types of BSs may have different transmit powerlevels, different coverage areas, and different impacts on interferencein wireless network 100. For example, macro BSs may have a high transmitpower level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relayBSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

A network controller 130 may couple to a set of BSs and may providecoordination and control for these BSs. Network controller 130 maycommunicate with the BSs via a backhaul. The BSs may also communicatewith one another, e.g., directly or indirectly via a wireless orwireline backhaul.

UEs 120 (e.g., 120 a, 120 b, 120 c) may be dispersed throughout wirelessnetwork 100, and each UE may be stationary or mobile. A UE may also bereferred to as an access terminal, a terminal, a mobile station, asubscriber unit, a station, or the like. A UE may be a cellular phone(e.g., a smart phone), a personal digital assistant (PDA), a wirelessmodem, a wireless communication device, a handheld device, a laptopcomputer, a cordless phone, a wireless local loop (WLL) station, atablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook,a medical device or equipment, biometric sensors/devices, wearabledevices (smart watches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart ring, smart bracelet)), anentertainment device (e.g., a music or video device, or a satelliteradio), a vehicular component or sensor, smart meters/sensors,industrial manufacturing equipment, a global positioning system device,or any other suitable device that is configured to communicate via awireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolvedor enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEsinclude, for example, robots, drones, remote devices, sensors, meters,monitors, and/or location tags, that may communicate with a basestation, another device (e.g., remote device), or some other entity. Awireless node may provide, for example, connectivity for or to a network(e.g., a wide area network such as Internet or a cellular network) via awired or wireless communication link. Some UEs may be consideredInternet-of-Things (IoT) devices, and/or may be implemented as NB-IoT(narrowband internet of things) devices. Some UEs may be considered aCustomer Premises Equipment (CPE). UE 120 may be included inside ahousing that houses components of UE 120, such as processor componentsand/or memory components. In some aspects, the processor components andthe memory components may be coupled together. For example, theprocessor components (e.g., one or more processors) and the memorycomponents (e.g., a memory) may be operatively coupled, communicativelycoupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular RAT andmay operate on one or more frequencies. A RAT may also be referred to asa radio technology, an air interface, or the like. A frequency may alsobe referred to as a carrier, a frequency channel, or the like. Eachfrequency may support a single RAT in a given geographic area in orderto avoid interference between wireless networks of different RATs. Insome cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120 a and UE 120e) may communicate directly using one or more sidelink channels (e.g.,without using a base station 110 as an intermediary to communicate withone another). For example, the UEs 120 may communicate usingpeer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol or avehicle-to-infrastructure (V2I) protocol), and/or a mesh network. Inthis case, the UE 120 may perform scheduling operations, resourceselection operations, and/or other operations described elsewhere hereinas being performed by the base station 110.

Devices of wireless network 100 may communicate using theelectromagnetic spectrum, which may be subdivided based on frequency orwavelength into various classes, bands, channels, or the like. Forexample, devices of wireless network 100 may communicate using anoperating band having a first frequency range (FR1), which may span from410 MHz to 7.125 GHz, and/or may communicate using an operating bandhaving a second frequency range (FR2), which may span from 24.25 GHz to52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred toas mid-band frequencies. Although a portion of FR1 is greater than 6GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 isoften referred to as a “millimeter wave” band despite being differentfrom the extremely high frequency (EHF) band (30 GHz-300 GHz) which isidentified by the International Telecommunications Union (ITU) as a“millimeter wave” band. Thus, unless specifically stated otherwise, itshould be understood that the term “sub-6 GHz” or the like, if usedherein, may broadly represent frequencies less than 6 GHz, frequencieswithin FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz).Similarly, unless specifically stated otherwise, it should be understoodthat the term “millimeter wave” or the like, if used herein, may broadlyrepresent frequencies within the EHF band, frequencies within FR2,and/or mid-band frequencies (e.g., less than 24.25 GHz). It iscontemplated that the frequencies included in FR1 and FR2 may bemodified, and techniques described herein are applicable to thosemodified frequency ranges.

As indicated above, FIG. 1 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 1 .

FIG. 2 is a diagram illustrating an example 200 of a base station 110 incommunication with a UE 120 in a wireless network 100, in accordancewith the present disclosure. Base station 110 may be equipped with Tantennas 234 a through 234 t, and UE 120 may be equipped with R antennas252 a through 252 r, where in general T≥1 and R≥1.

At base station 110, a transmit processor 220 may receive data from adata source 212 for one or more UEs, select one or more modulation andcoding schemes (MCS) for each UE based at least in part on channelquality indicators (CQIs) received from the UE, process (e.g., encodeand modulate) the data for each UE based at least in part on the MCS(s)selected for the UE, and provide data symbols for all UEs. Transmitprocessor 220 may also process system information (e.g., for semi-staticresource partitioning information (SRPI)) and control information (e.g.,CQI requests, grants, and/or upper layer signaling) and provide overheadsymbols and control symbols. Transmit processor 220 may also generatereference symbols for reference signals (e.g., a cell-specific referencesignal (CRS) or a demodulation reference signal (DMRS)) andsynchronization signals (e.g., a primary synchronization signal (PSS) ora secondary synchronization signal (SSS)). A transmit (TX)multiple-input multiple-output (MIMO) processor 230 may perform spatialprocessing (e.g., precoding) on the data symbols, the control symbols,the overhead symbols, and/or the reference symbols, if applicable, andmay provide T output symbol streams to Tmodulators (MODs) 232 a through232 t. Each modulator 232 may process a respective output symbol stream(e.g., for OFDM) to obtain an output sample stream. Each modulator 232may further process (e.g., convert to analog, amplify, filter, andupconvert) the output sample stream to obtain a downlink signal. Tdownlink signals from modulators 232 a through 232 t may be transmittedvia T antennas 234 a through 234 t, respectively.

At UE 120, antennas 252 a through 252 r may receive the downlink signalsfrom base station 110 and/or other base stations and may providereceived signals to demodulators (DEMODs) 254 a through 254 r,respectively. Each demodulator 254 may condition (e.g., filter, amplify,downconvert, and digitize) a received signal to obtain input samples.Each demodulator 254 may further process the input samples (e.g., forOFDM) to obtain received symbols. A MIMO detector 256 may obtainreceived symbols from all R demodulators 254 a through 254 r, performMIMO detection on the received symbols if applicable, and providedetected symbols. A receive processor 258 may process (e.g., demodulateand decode) the detected symbols, provide decoded data for UE 120 to adata sink 260, and provide decoded control information and systeminformation to a controller/processor 280. The term“controller/processor” may refer to one or more controllers, one or moreprocessors, or a combination thereof. A channel processor may determinea reference signal received power (RSRP) parameter, a received signalstrength indicator (RSSI) parameter, a reference signal received quality(RSRQ) parameter, an/or a CQI parameter, among other examples. In someaspects, one or more components of UE 120 may be included in a housing284.

Network controller 130 may include communication unit 294,controller/processor 290, and memory 292. Network controller 130 mayinclude, for example, one or more devices in a core network. Networkcontroller 130 may communicate with base station 110 via communicationunit 294.

Antennas (e.g., antennas 234 a through 234 t and/or antennas 252 athrough 252 r) may include, or may be included within, one or moreantenna panels, antenna groups, sets of antenna elements, and/or antennaarrays, among other examples. An antenna panel, an antenna group, a setof antenna elements, and/or an antenna array may include one or moreantenna elements. An antenna panel, an antenna group, a set of antennaelements, and/or an antenna array may include a set of coplanar antennaelements and/or a set of non-coplanar antenna elements. An antennapanel, an antenna group, a set of antenna elements, and/or an antennaarray may include antenna elements within a single housing and/orantenna elements within multiple housings. An antenna panel, an antennagroup, a set of antenna elements, and/or an antenna array may includeone or more antenna elements coupled to one or more transmission and/orreception components, such as one or more components of FIG. 2 .

On the uplink, at UE 120, a transmit processor 264 may receive andprocess data from a data source 262 and control information (e.g., forreports that include RSRP, RSSI, RSRQ, and/or CQI) fromcontroller/processor 280. Transmit processor 264 may also generatereference symbols for one or more reference signals. The symbols fromtransmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by modulators 254 a through 254 r (e.g.,for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In someaspects, a modulator and a demodulator (e.g., MOD/DEMOD 254) of the UE120 may be included in a modem of the UE 120. In some aspects, the UE120 includes a transceiver. The transceiver may include any combinationof antenna(s) 252, modulators and/or demodulators 254, MIMO detector256, receive processor 258, transmit processor 264, and/or TX MIMOprocessor 266. The transceiver may be used by a processor (e.g.,controller/processor 280) and memory 282 to perform aspects of any ofthe methods described herein.

At base station 110, the uplink signals from UE 120 and other UEs may bereceived by antennas 234, processed by demodulators 232, detected by aMIMO detector 236 if applicable, and further processed by a receiveprocessor 238 to obtain decoded data and control information sent by UE120. Receive processor 238 may provide the decoded data to a data sink239 and the decoded control information to controller/processor 240.Base station 110 may include communication unit 244 and communicate tonetwork controller 130 via communication unit 244. Base station 110 mayinclude a scheduler 246 to schedule UEs 120 for downlink and/or uplinkcommunications. In some aspects, a modulator and a demodulator (e.g.,MOD/DEMOD 232) of the base station 110 may be included in a modem of thebase station 110. In some aspects, the base station 110 includes atransceiver. The transceiver may include any combination of antenna(s)234, modulators and/or demodulators 232, MIMO detector 236, receiveprocessor 238, transmit processor 220, and/or TX MIMO processor 230. Thetransceiver may be used by a processor (e.g., controller/processor 240)and memory 242 to perform aspects of any of the methods describedherein.

Controller/processor 240 of base station 110, controller/processor 280of UE 120, and/or any other component(s) of FIG. 2 may perform one ormore techniques associated with UE antenna prioritzation, as describedin more detail elsewhere herein. For example, controller/processor 240of base station 110, controller/processor 280 of UE 120, and/or anyother component(s) of FIG. 2 may perform or direct operations of, forexample, process 700 of FIG. 7 and/or other processes as describedherein. Memories 242 and 282 may store data and program codes for basestation 110 and UE 120, respectively. In some aspects, memory 242 and/ormemory 282 may include a non-transitory computer-readable medium storingone or more instructions for wireless communication. The memory maystore a computer program that provides instructions, when the computerprogram is executed. For example, the one or more instructions, whenexecuted (e.g., directly, or after compiling, converting, and/orinterpreting) by one or more processors of the base station 110 and/orthe UE 120, may cause the one or more processors, the UE 120, and/or thebase station 110 to perform or direct operations of, for example,process 700 of FIG. 7 and/or other processes as described herein. Insome aspects, executing instructions may include running theinstructions, converting the instructions, compiling the instructions,and/or interpreting the instructions.

In some aspects, the UE 120 includes means for establishing a firstcommunication link using a first radio access technology (RAT); meansfor establishing a second communication link using a second RAT; meansfor determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT; and/or means for prioritizing antenna selectionfor the first communication link or the second communication link basedat least in part on the determination. The means for the UE 120 toperform operations described herein may include, for example, antenna252, demodulator 254, MIMO detector 256, receive processor 258, transmitprocessor 264, TX MIMO processor 266, modulator 254,controller/processor 280, and/or memory 282.

In some aspects, the UE 120 includes means for operating in a standalonemode on the first communication link using the first RAT; means forestablishing the second communication link using the second RAT toestablish a dual connectivity configuration; and/or means fordetermining to prioritize antenna selection for the first communicationlink using the first RAT as an initial configuration for the dualconnectivity configuration. In some aspects, the UE 120 includes meansfor determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT based at least in part on one or more antennaprioritization parameters. In some aspects, the UE 120 includes meansfor determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that at least a subset of the one or more antennaprioritization parameters are satisfied.

In some aspects, the UE 120 includes means for determining to prioritizeantenna selection for the second communication link using the second RATbased at least in part on a determination that at least a subset of theone or more antenna prioritization parameters are not satisfied. In someaspects, the UE 120 includes means for determining to prioritize antennaselection for the first communication link using the first RAT based atleast in part on the service type associated with the firstcommunication link being a VoLTE service or a VoNR service. In someaspects, the UE 120 includes means for determining to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that the signal measurement associatedwith the first communication link does not satisfy a threshold.

In some aspects, the UE 120 includes means for determining to prioritizeantenna selection for the second communication link using the second RATbased at least in part on a determination that the signal measurementassociated with the first communication link satisfies a threshold. Insome aspects, the UE 120 includes means for determining to prioritizeantenna selection for the first communication link using the first RATbased at least in part on a determination that the difference in signalmeasurements between the transmit antenna for the first communicationlink and the non-transmit antenna for the first communication linksatisfies a threshold.

In some aspects, the UE 120 includes means for determining to prioritizeantenna selection for the second communication link using the second RATbased at least in part on a determination that the difference in signalmeasurements between the transmit antenna for the first communicationlink and the non-transmit antenna for the first communication link doesnot satisfy a threshold. In some aspects, the UE 120 includes means fordetermining to prioritize antenna selection for the first communicationlink using the first RAT; and/or means for selecting a first transmitantenna, of a plurality of antennas of the UE, for the firstcommunication link; and/or means for selecting a second transmitantenna, of the plurality of antennas, for the second communicationlink, after selecting the first transmit antenna for the firstcommunication link.

In some aspects, the UE 120 includes means for selecting, as the firsttransmit antenna, a preferred transmit antenna for the firstcommunication link. In some aspects, the UE 120 includes means forselecting, as the second transmit antenna, a remaining antenna of theplurality of antennas for the first communication link, wherein theremaining antenna is different from the preferred transmit antenna. Insome aspects, the UE 120 includes means for determining a soundingreference signal (SRS) alternative path for the second transmit antenna;and/or means for determining a blanking mask for the first communicationlink on the first transmit antenna based at least in part on the SRSalternative path for the second transmit antenna. In some aspects, theUE 120 includes means for refraining from switching antenna selectionpriority between the first communication link and the secondcommunication link for a configured time period from determining toprioritize antenna selection for the first communication link.

In some aspects, the UE 120 includes means for determining to prioritizeantenna selection for the second communication link using the secondRAT; and/or means for selecting a first transmit antenna of a pluralityof transmit antennas for the UE 120 for the second RAT; and/or means forselecting a second transmit antenna of the plurality of antennas for thefirst RAT after selecting the second transmit antenna for the secondRAT. In some aspects, the UE 120 includes means for selecting, as thesecond transmit antenna, a preferred transmit antenna for the secondcommunication link. In some aspects, the UE 120 includes means forselecting, as the first transmit antenna, a remaining antenna of theplurality of antennas for the second communication link, wherein theremaining antenna is different from the preferred transmit antenna.

In some aspects, the UE 120 includes means for determining an SRSalternative path for the second transmit antenna; and/or means fordetermining a blanking mask for the first communication link on thefirst transmit antenna based at least in part on the SRS alternativepath for the second transmit antenna. In some aspects, the UE 120includes means for refraining from switching antenna selection prioritybetween the first communication link and the second communication linkfor a configured time period from determining to prioritize antennaselection for the second communication link.

In some aspects, the UE 120 includes means for determining to prioritizeantenna selection for the first communication link using the first RATbased at least in part on a determination that a second highest RSRPmeasurement associated with the first communication link does notsatisfy a threshold. In some aspects, the UE 120 includes means fordetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thata second highest RSRP measurement associated with the firstcommunication link satisfies a threshold.

As indicated above, FIG. 2 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 2 .

FIG. 3 is a diagram illustrating an example 300 of dual connectivity, inaccordance with the present disclosure. The example shown in FIG. 3 isfor an Evolved Universal Mobile Telecommunications System TerrestrialRadio Access (E-UTRA)-NR dual connectivity (ENDC) mode. In the ENDCmode, a UE 120 communicates using an LTE RAT on a master cell group(MCG), and the UE 120 communicates using an NR RAT on a secondary cellgroup (SCG). However, aspects described herein may apply to an ENDC mode(e.g., where the MCG is associated with an LTE RAT, and the SCG isassociated with an NR RAT), an NR-E-UTRA dual connectivity (NEDC) mode(e.g., where the MCG is associated with an NR RAT, and the SCG isassociated with an LTE RAT), an NR dual connectivity (NRDC) mode (e.g.,where the MCG is associated with an NR RAT, and the SCG is alsoassociated with the NR RAT), or another dual connectivity mode (e.g.,where the MCG is associated with a first RAT, and the SCG is associatedwith one of the first RAT or a second RAT). The ENDC mode is sometimesreferred to as an NR or 5G non-standalone (NSA) mode. Thus, as usedherein, “dual connectivity mode” may refer to an ENDC mode, a NEDC mode,an NRDC mode, and/or another type of dual connectivity mode.

As shown in FIG. 3 , a UE 120 may communicate with both an eNB (e.g., a4G base station 110) and a gNB (e.g., a 5G base station 110), and theeNB and the gNB may communicate (e.g., directly or indirectly) with a4G/LTE core network, shown as an evolved packet core (EPC) that includesa mobility management entity (MME), a packet data network gateway (PGW),a serving gateway (SGW), and/or the like. The UE 120 may establish andcommunicate on a first communication link with the eNB using an LTE RATand may establish and communicate on a second communication link withthe gNB using an NR RAT. In FIG. 3 , the PGW and the SGW are showncollectively as P/SGW. In some aspects, the eNB and the gNB may beco-located at the same base station 110. In some aspects, the eNB andthe gNB may be included in different base stations 110 (i.e., may not beco-located).

As further shown in FIG. 3 , in some aspects, a wireless network thatpermits operation in a 5G NSA mode may permit such operations using anMCG for a first RAT (e.g., an LTE RAT, a 4G RAT, and/or the like) and anSCG for a second RAT (e.g., an NR RAT, a 5G RAT, and/or the like). Inthis case, the UE 120 may communicate with the eNB via the MCG and maycommunicate with the gNB via the SCG. In some aspects, the MCG mayanchor a network connection between the UE 120 and the 4G/LTE corenetwork (e.g., for mobility, coverage, control plane information, and/orthe like), and the SCG may be added as additional carriers to increasethroughput (e.g., for data traffic, user plane information, and/or thelike). In some aspects, the gNB and the eNB may not transfer user planeinformation between one another. In some aspects, a UE 120 operating ina dual connectivity mode may be concurrently connected with an LTE basestation 110 (e.g., an eNB) and an NR base station 110 (e.g., a gNB)(e.g., in the case of ENDC or NRDC). Alternatively, in some aspects, aUE 120 may be concurrently connected with one or more base stations 110that use the same RAT (e.g., in the case of NRDC). In some aspects, theMCG may be associated with a first frequency band (e.g., a sub-6 GHzband and/or an FR1 band), and the SCG may be associated with a secondfrequency band (e.g., a millimeter wave band and/or an FR2 band).

The UE 120 may communicate via the MCG and the SCG using one or moreradio bearers (e.g., data radio bearers (DRBs), signaling radio bearers(SRBs), and/or the like). For example, the UE 120 may transmit orreceive data via the MCG and/or the SCG using one or more DRBs.Similarly, the UE 120 may transmit or receive control information (e.g.,radio resource control (RRC) information, measurement reports, and/orthe like) using one or more SRBs. In some aspects, a radio bearer may bededicated to a specific cell group (e.g., a radio bearer may be an MCGbearer, an SCG bearer, and/or the like). In some aspects, a radio bearermay be an SRB. An SRB may be split in the uplink and/or in the downlink.For example, a DRB may be split on the downlink (e.g., the UE 120 mayreceive downlink information for the MCG or the SCG in the DRB) but noton the uplink (e.g., the uplink may be non-split with a primary path tothe MCG or the SCG, such that the UE 120 transmits in the uplink only onthe primary path). In some aspects, a DRB may be split on the uplinkwith a primary path to the MCG or the SCG. A DRB that is split in theuplink may transmit data using the primary path until a size of anuplink transmit buffer satisfies an uplink data split threshold. If theuplink transmit buffer satisfies the uplink data split threshold, the UE120 may transmit data to the MCG or the SCG using the DRB.

As indicated above, FIG. 3 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 3 .

FIG. 4 is a diagram illustrating an example 400 of a set of radiofrequency (RF) chains of a UE, in accordance with the presentdisclosure. The RF chains of the UE may be part of an RF front-end ofthe UE, which may be shared across a plurality of different types ofRATs such as LTE and NR. FIG. 4 shows a transceiver 405, a set ofcross-switches 410-1 and 410-2, and a set of antennas 415-1 through415-4. The set of antennas 415 are grouped into an upper antenna set,which may be situated in an upper region of the UE, and a lower antennaset, which may be situated in a lower region of the UE. Thus, antennadiversity is achieved in situations where one of the upper region, orthe lower region of the UE may be impeded, for example, by a user's handor other blockage.

A cross-switch 410 may provide for an input signal 420 to be switchedfrom one antenna 415 to another antenna 415, or for a signal receivedfrom an antenna 415 to be switched from one receive path to anotherreceive path. A cross-switch 410 may be a hardware component (e.g., aphysical switch) or may be implemented in the baseband via precodingand/or the like. A cross-switch 410 may include, for example, an N-poleby M-throw cross-switch, a plurality of cascaded cross switches (e.g., aplurality of cascaded N-pole by M-throw cross-switches, X-pole by Y-polecross-switches, and/or A-pole by B-pole cross-switches), or anotherconfiguration of cross-switches. A cross-switch configuration mayindicate how signals are mapped to antennas by a cross-switch 410. Insome aspects, a cross-switch 410 may implement an antenna switchingconfiguration, such as an antenna switching diversity configuration,which may improve antenna diversity of transmissions of the UE.

An antenna 415 may be antenna 252 and/or the like. An antenna 415 canperform reception, transmission, or a combination thereof. For example,a RAT may be associated with one or more receive antennas and one ormore transmit antennas. In example 400, there are two RATs: an LTE RATassociated with band B3, and an NR RAT associated with band N41. Forexample, the UE of example 400 may be associated with an ENDCconfiguration, wherein the LTE RAT is associated with a primary cell(PCell) and the NR RAT is associated with a primary secondary cell(PSCell). The NR RAT and the LTE RAT may both be associated with 4receive antennas and 1 transmit antenna, which is denoted by 1T4R.Furthermore, each of the NR RAT and the LTE RAT may be associated with aprimary receive (PRX) antenna.

Some transmissions may be performed using an antenna order. An antennaorder may define an order in which antennas 415 are to be sequentiallyused to perform a transmission. As an example, an SRS may be transmittedusing an antenna order in order to improve transmit diversity. An SRS isa signal used to sound parts of the spectrum that are not in use by anallocated resource block, in order for a base station to estimatechannel quality. In the course of transmitting the SRS using the antennaorder, the UE may switch an antenna used for a current physical uplinkshared channel (PUSCH) to a different antenna used for reception in acurrent operating frequency channel (e.g., associated with an absoluteradio-frequency channel number (ARFCN)). The base station may use theSRS for improve downlink precoding, thereby improving downlinkmultiple-input multiple-output (MIMO) performance. As an example of anantenna order, the SRS may be transmitted on antennas 415-4, 415-3,415-2, and 415-1 in order, which may be represented by (4,3,2,1). InFIG. 4 , the SRS antenna order is represented by the numbers in brackets(for example, the [4] shown by reference number 420 indicates thatantenna 415-1 is a fourth antenna in the antenna order). The SRStransmission may be performed periodically (e.g., in accordance with aperiodicity).

The UE of example 400 may share RF front end (RFFE) resources (e.g.,cross-switch 410, antenna 415, and/or the like) between the LTE RAT andthe NR RAT. In these cases, as an example, an LTE RAT communication linkand an NR RAT communication link (e.g., in a sub-6 gigahertz (GHz)mid-band or high-band operating frequency) may share antennas 415, andmay therefore share cross-switches 410. The RFFE resources may be sharedacross the LTE RAT and the NR RAT in various configurations. As anexample, RFFE resources may be shared where the LTE RAT is 2-Rx antennaor 4-Rx antenna capable, and the NR RAT is 4-Rx antenna capable. Asanother example, RFFE resources may be shared where the LTE RAT and theNR RAT operate in various duplexing combinations, such as LTE RATfrequency division duplexing (FDD)+NR RAT time division duplexing (TDD),LTE RAT TDD+NR RAT TDD, LTE RAT TDD+NR RAT FDD, LTE RAT FDD+NR RAT FDD,and/or the like. As another example, RFFE resources may be shared whereNR RAT SRS antenna switching is supported with or without LTE RAT Tx/Rxblanking. As another example, RFFE resources may be shared wheresubcarriers are aggregated (referred to as carrier aggregation) acrossthe LTE RAT and/or the NR RAT. As another example, RFFE resources may beshared where the LTE RAT and the NR RAT are operated in amulti-subscriber identification module (MSIM) configuration.

In some aspects, the UE may configure the cross-switches 410 and/or theantennas 415 to support antenna switched diversity configurations for aplurality of communication links that operate on different types of RATs(e.g., a communication link using an LTE RAT and another communicationlink using an NR RAT). In these cases, the UE is capable of configuringcombinations of antennas to be used for a particular type of RAT tosupport control signaling between the UE and a wireless network in adual connectivity configuration (e.g., ENDC) to support SRStransmissions, to provide increased reliability and/or throughput on acommunication link for a particular type of RAT, to decrease latency ona communication link for a particular type of RAT, and/or for otherpurposes.

Due to the RFFE resources of the UE being shared across a plurality ofcommunication links for different types of RATs, in some cases the UEmay determine that the preferred antennas or antenna combinations forthe plurality of communication links are the same antennas or antennacombinations. Since an antenna may be assigned to only one communicationlink, the UE may be unable to determine which communication link is tobe assigned the antenna. Assigning the antenna to a first communicationlink in some scenarios may lead to performance degradation on a secondcommunication link, while assigning the antenna to the secondcommunication link may lead to poor reliability and radio link failure(RLF) on the first communication link in other scenarios.

Some techniques and apparatuses described herein provide techniques andapparatus for UE antenna prioritization across a plurality ofcommunication links. In some aspects, the communication links mayoperate on the same RAT or on different RATs (e.g., a firstcommunication link may use an LTE RAT and a second communication linkmay use an NR RAT, the first communication link may use an NR RAT andthe second communication link may use another NR RAT) in a dualconnectivity configuration (e.g., ENDC, NRDC). In some aspects, a UE iscapable of prioritizing the selection of antennas for communicationlinks that share an RF front-end of the UE (e.g., that share RFFEresources).

For example, the UE may determine that a first communication link usinga first RAT is to be prioritized and may accordingly, select theantenna(s) (e.g., may select the antenna switched diversityconfiguration) for the first communication link prior to selecting theantenna(s) (e.g., the antenna switched diversity configuration) for thesecond communication link. As another example, the UE may determine thatthe second communication link using the second RAT is to be prioritizedand may accordingly select the antenna(s) (e.g., may select the antennaswitched diversity configuration) for the second communication linkprior to selecting the antenna(s) (e.g., the antenna switched diversityconfiguration) for the first communication link. Moreover, the UE iscapable of reducing frequent switching (or ping-ponging) between theprioritization for different communication links by limiting switchingbetween different communication links being prioritized until after aparticular period of time.

In this way, the UE is capable of prioritizing the antennas across aplurality of communication links in a dual connectivity configuration(as well as in multi-connectivity configurations including three or morecommunication links). This enables the UE to select preferred antennasand/or antenna switched diversity configurations to increase coverage,increase performance, increase reliability, increase throughput, and/ordecrease latency for various types of services and/or for variouscommunication and coverage scenarios. For example, the UE may prioritizeantenna selection for a communication link using an LTE RAT where avoice call (e.g., a voice over LTE (VoLTE) call) service is beingprovided. As another example, the UE may prioritize antenna selectionfor a communication link using an LTE RAT during heavy network signalinginstances where there is RRC related signaling due to an RF bandadd/drop event, which may occur due to mobility or network loading in adual connectivity configuration. As another example, the UE mayprioritize antenna selection for a communication link using an NR RATwhere coverage and/or antenna imbalance for another communication linkusing an LTE RAT are within associated thresholds.

As indicated above, FIG. 4 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 4 .

FIG. 5 is a diagram illustrating one or more examples 500 associatedwith UE antenna prioritization, in accordance with the presentdisclosure. Example(s) 500 include a UE (e.g., UE 120) that is capableof operating in a dual connectivity configuration (e.g., an ENDCconfiguration or another type of dual connectivity configuration such asNRDC) on a plurality of communication links. Moreover, example(s) 500include a UE that includes a shared RF front-end in which RFFE resources(e.g., cross-switches 410, antennas 415, and/or the like) are sharedacross the plurality of communication links.

In some aspects, two or more of the communication links use differenttypes of RATs. For example, a first communication link (communicationlink 1) with an eNB (e.g., base station 110) may use an LTE RAT (RAT 1),and a second communication link (communication link 2) with a gNB mayuse an NR RAT (RAT 2). In some aspects, other types of dual connectivityconfigurations are supported, such as an NR RAT (RAT 1) and another NRRAT (RAT 2) (e.g., NRDC).

As shown in FIG. 5 , the UE may operate in various modes associated withdual connectivity and/or antenna prioritization. As show by referencenumber 502, the UE may operate in a standalone mode on communicationlink 1 using RAT 1. In some aspects, the UE may establish communicationlink 1 by initiating a connection with a base station (e.g., byinitiating a random access channel (RACH) procedure with the basestation).

In this mode, the UE is not in a dual connectivity configuration andoperates on communication link 1 only. In the standalone mode, the UEmay select antennas for communication link 1 based on which antennas arepreferred for communication link 1 and/or RAT 1. The UE may determinewhich antennas are preferred for communication link 1 (e.g., a preferredTx antenna and/or a preferred Rx antenna) based at least in part onquality of service (QoS) parameters for RAT 1 and/or the type of servicebeing provided on communication link 1 (e.g., a voice call service, adata session service, and/or another type of service), based at least inpart on signal measurements on communication link 1 (e.g., RSRPmeasurements or another type of signal measurement using each of theplurality of antennas of the RF front-end of the UE), power headroommeasurements, and/or other types of factors.

As further shown in FIG. 5 , and by reference number 504, the UE maytransition to a dual connectivity establishment mode, in whichcommunication link 1 using RAT 1 and communication link 2 using RAT 2are established for the UE. The UE may transition to the dualconnectivity establishment mode by establishing communication link 2using RAT 2. For example, the UE may add a cell of another base stationby initiating a connection with the other base station (e.g., byperforming another RACH procedure). As another example, the UE mayperform a handover (HO) to the cell (e.g., from another cell) totransition to the dual connectivity establishment mode. In some aspects,during operation in the dual connectivity establishment mode, the UE maytransition to the standalone mode on communication link 1 (referencenumber 502) based at least in part on cell release on communication link2, a radio link failure on communication link 2, a handover to adifferent cell on communication link 2, and/or another event associatedwith communication link 2.

As shown by reference number 506, the UE may transition to an initialdual connectivity configuration (e.g., an initial antenna configurationfor the dual connectivity configuration). The UE may prioritize antennaselection for communication link 1 to establish the initial dualconnectivity configuration. In some aspects, the UE determines toprioritize the antenna selection for communication link 1 based at leastin part on RAT 1 being an anchor RAT for the dual connectivityconfiguration (e.g., the RAT on which the main control signaling for thedual connectivity configuration is transmitted and/or received).

If, when operating in the initial dual connectivity configuration, afrequency band change occurs on communication link 1, the UE maytransition back to establishment of the dual connectivity configuration(reference number 504). Once the UE transitions back to establishment ofthe dual connectivity configuration, the UE may perform a joint retuningof the antennas for communication link 1 and communication link 2 suchthat communication link 1 and communication link 2 share thecross-switches and antennas of the UE's RF front-end. If, duringoperation in the initial dual connectivity configuration, the UE maytransition to the standalone mode on communication link 1 (referencenumber 502) based at least in part on cell release on communication link2, a radio link failure on communication link 2, a handover to adifferent cell on communication link 2, and/or another event associatedwith communication link 2.

The UE may prioritize antenna selection for communication link 1 byselecting a transmit antenna for communication link 1 and then selectingthe transmit antenna for communication link 2. The UE selects thetransmit antenna for communication link 2 to be different from thetransmit antenna selected for communication link 1 such that thecommunication paths for communication link 1 and communication link 2 donot overlap. In this way, the UE may select the preferred transmitantenna for communication link 1 and selects one of the remainingantennas of the plurality of antennas of the UE's front-end for thetransmit antenna of communication link 2. In some aspects, the preferredtransmit antenna may be the transmit antenna that was used forcommunication link 1 while the UE was in the standalone mode, or may beanother transmit antenna that is selected based at least in part onvarious factors such as signal measurements, the type of service beingprovided on communication link 1, power headroom measurements, and/orother parameters. The UE may select the transmit antenna forcommunication link 2 based at least in part on similar factors.

In some aspects, the UE may also select the preferred receive antennafor communication link 1 prior to selecting the transmit antenna forcommunication link 2 or may select the receive antenna for communicationlink 1 after selecting the transmit antenna for communication link 2.The UE may select the receive antenna for communication link 2 afterselecting the receive antenna for communication link 1. In some aspects,for each selection option of the transmit antenna for communication link2, the UE may determine the candidate antenna selections for the receiveantenna of communication link 1 and the receive antenna of communicationlink 2 (e.g., that are different from the transmit antennas ofcommunication link 1 and communication link 2). The UE may also checkthe receive antenna paths to validate that the RF front-end supports thereceive antenna paths.

In some aspects, if the UE supports SRS antenna switching oncommunication link 2, the UE may determine an SRS alternative path forthe transmit antenna of communication link 2, and may determine ablanking mask for communication link 1 on the transmit antenna ofcommunication link 1 based at least in part on the SRS alternative pathfor the transmit antenna of communication link 1. If RAT 2 is an NR RAT,beam-based communication may be supported on communication link 2. TheUE may transmit an SRS on communication link 2 so that the associatedgNB may configure beams (e.g., transmit beams and/or receive beams) forthe UE to use for communication link 2. If an SRS transmission oncommunication link 2 at least partially overlaps with transmission orreception on communication link 1, the transmission or reception oncommunication link 1 may cause interference with SRS transmission and/ormay cause the SRS transmission to be postponed. Accordingly, theblanking mask may be used to blank or prevent transmission and/orreception on communication link 1 during transmission of an SRS oncommunication link 2. The blanking mask may identify each of theplurality of antennas of the UE's RF front-end. The blanking mask mayfurther identify whether the UE is permitted to use each antenna fortransmission and/or reception on communication link 1 duringtransmission of an SRS on communication link 2. The blanking mask mayfurther identify what frequency bands open which the UE is permitted totransmit and/or receive during an SRS transmission on communication link2.

The UE may prepare for a multi-request based joint retune between RAT 1on communication link 1 and RAT 2 on communication link 2 to configurean antenna switched diversity configuration based at least in part onthe selected antennas and the blanking mask. The UE may provide thesignal path for communication link 1 a transmit antenna configurationand a receive antenna configuration to tune communication link 1, mayprovide the signal path for communication link 2 a transmit antennaconfiguration and a receive antenna configuration to tune communicationlink 2, may provide the signal path for communication link 2 an SRSalternative path for SRS antenna-switching, and/or may provide thesignal path for communication link 2 the blanking mask for blankingduring SRS transmission.

As further shown in FIG. 5 , and by reference number 508, the UE maytransition to a mode in which the antenna selection for communicationlink 1 is prioritized based at least in part on selecting the transmitand receive antennas for communication link 1 and communication link 2as described above. Here, the UE may remain in the mode in which theantenna selection for communication link 1 is prioritized based at leastin part on monitoring one or more antenna prioritization parameters. Inparticular, the UE may remain in the mode in which the antenna selectionfor communication link 1 is prioritized based at least in part ondetermining whether the one or more antenna prioritization parametersare satisfied.

The one or more antenna prioritization parameters may include a type ofservice being provided on communication link 1, one or more signalmeasurement thresholds for communication link 1, a power headroommeasurement threshold for communication link 1, an antenna measurementdifferential threshold for communication link 1, and/or otherparameters. As an example, the UE may determine to prioritize antennaselection for communication link 1 based at least in part on a voicecall service (e.g., VoLTE or voice over NR (VoNR)) being provided oncommunication link 1 (e.g., Asdiv_ENDC_LTE_VoLTE parameter).

As another example, the UE may determine to prioritize antenna selectionfor communication link 1 based at least in part on determining that asignal measurement (e.g., an RSRP measurement, an RSSI measurement, anRSRQ measurement, a CQI measurement, and/or another type of signalmeasurement) on communication link 1 satisfies the signal measurementthreshold (e.g., an Asdiv_ENDC_LTE_rsrp parameter). In some aspects, thesignal measurement is a highest RSRP measurement associated with anantenna of the UE on communication link 1.

As another example, the UE may determine to prioritize antenna selectionfor communication link 1 based at least in part on determining that apower headroom measurement for communication link 1 satisfies the powerheadroom measurement threshold. The power headroom on communication link1 may be a transmit power headroom relative to the UE's maximum transmitpower limit for a given frequency band. For example, if the UE's maximumtransmit power is 23 dBm, and the UE's normalized transmit power is 20dBm, the UE may determine that the power headroom on communication link1 is 3 dB. The UE's average transmit power headroom may be normalizedper resource block over a period of time, such as 320 ms or 640 ms forexample. The UE may determine whether the power headroom or averagepower headroom of the UE satisfies the power headroom measurement.

As another example, the UE may determine to prioritize antenna selectionfor communication link 1 based at least in part on determining that anantenna measurement differential on communication link 1 satisfies theantenna measurement differential threshold (e.g.,Asdiv_ENDC_LTE_rsrpdelta) on communication link 1. The antennameasurement differential may correspond to a difference in signalmeasurements between the selected transmit antenna for communicationlink 1 and a non-transmit antenna (e.g., a receive antenna) forcommunication link 1. The UE may evaluate the signal measurements over aparticular time period (e.g., every 640 ms) and may use filteredmeasurements. The signal measurements may include RSRP measurements,RSSI measurements, RSRQ measurements, CQI measurements, and/or othersignal measurements.

In some aspects, the UE determines to prioritize antenna selection forcommunication link 1 or communication link 2 based at least in part on acombination of antenna prioritization parameters. For example, the UEmay determine to prioritize antenna selection for communication link 1or communication link 2 based at least in part on a combination of thesignal measurement associated with communication link 1 and the antennameasurement differential on communication link 1. Alternatively, the UEmay determine to prioritize antenna selection for communication link 1or communication link 2 based at least in part on whether a secondhighest signal measurement on communication link 1 (e.g., an RSRPmeasurement using the antenna on communication link 1) satisfies thesignal measurement threshold. This may simplify the determination andmay reduce or prevent frequent and/or rapid flip-flopping between theprioritization of communication link 1 and the prioritization ofcommunication link 2 that might otherwise occur in scenarios in whichthe highest RSRP of the UE may dither between satisfying the signalmeasurement threshold and not satisfying the signal measurementthreshold. Moreover, a determination that the second highest signalmeasurement on communication link 1 does not satisfy the signalmeasurement threshold may be an indication that there are no goodcandidate antennas for communication link 1, in which case the UE mayprioritize antenna selection for communication link 1.

In some aspects, during operation in the mode in which the antennaselection for communication link 1 is prioritized, the UE may transitionto the standalone mode on communication link 1 (reference number 502)based at least in part on cell release on communication link 2, a radiolink failure on communication link 2, a handover to a different cell oncommunication link 2, and/or another event associated with communicationlink 2. In some aspects, during operation in the mode in which theantenna selection for communication link 1 is prioritized, the UE maytransition to the dual connectivity connection establishment mode(reference number 504) based at least in part on a frequency band changeon communication link 2.

As further shown in FIG. 5 , and by reference number 510, if the UEdetermines that all or a subset of the one or more antennaprioritization parameters described above are not satisfied, the UE maytransition to a mode in which antenna selection for communication link 2is prioritized (e.g., prioritized over antenna selection forcommunication link 1). In this mode, the UE may retune the antennaconfigurations (e.g., the antenna switched diversity configurations) forcommunication link 1 and communication link 2 such that the preferredtransmit antenna for communication link 2 is selected for communicationlink 2. Once the antenna selection for communication link 2 has beenprioritized, the UE may remain in the mode in which the antennaselection for communication link 2 is prioritized based at least in parton monitoring one or more antenna prioritization parameters. Inparticular, the UE may remain in the mode in which the antenna selectionfor communication link 2 is prioritized based at least in part ondetermining that all or a subset of the one or more antennaprioritization parameters described above are not satisfied.

In some aspects, during operation in the mode in which the antennaselection for communication link 2 is prioritized, the UE may transitionto the standalone mode on communication link 1 (reference number 502)based at least in part on cell release on communication link 2, a radiolink failure on communication link 2, a handover to a different cell oncommunication link 2, and/or another event associated with communicationlink 2. In some aspects, during operation in the mode in which theantenna selection for communication link 2 is prioritized, the UE maytransition to the dual connectivity connection establishment mode(reference number 504) based at least in part on a frequency band changeon communication link 2.

The UE may prioritize antenna selection for communication link 2 byselecting a transmit antenna for communication link 2 and then selectingthe transmit antenna for communication link 1. The UE selects thetransmit antenna for communication link 1 to be different from thetransmit antenna selected for communication link 2 such that thecommunication paths for communication link 1 and communication link 2 donot overlap. In this way, the UE may select the preferred transmitantenna for communication link 2 and may select one of the remainingantennas of the plurality of antennas of the UE's shared front-end forthe transmit antenna of communication link 1. In some aspects, the UEmay determine the preferred transmit antenna for communication link 2based at least in part on various factors such as signal measurements,the type of service being provided on communication link 2, powerheadroom measurements, and/or other parameters. The UE may select thetransmit antenna for communication link 1 based at least in part onsimilar factors.

In some aspects, the UE may also select the preferred receive antennafor communication link 2 prior to selecting the transmit antenna forcommunication link 1 or may select the receive antenna for communicationlink 2 after selecting the transmit antenna for communication link 1.The UE may select the receive antenna for communication link 1 afterselecting the receive antenna for communication link 2. In some aspects,for each selection option of the transmit antenna for communication link1, the UE may determine the candidate antenna selections for the receiveantenna of communication link 1 and the receive antenna of communicationlink 2 (e.g., that are different from the transmit antennas ofcommunication link 1 and communication link 2). The UE may also checkthe receive antenna paths to validate that the RF front-end supports thereceive antenna paths.

In some aspects, if the UE supports SRS antenna switching oncommunication link 2, the UE may determine an SRS alternative path forthe transmit antenna of communication link 2, and may determine ablanking mask for communication link 1 on the transmit antenna ofcommunication link 1 based at least in part on the SRS alternative pathfor the transmit antenna of communication link 2. The blanking mask mayidentify each of the plurality of antennas of the UE's RF front-end. Theblanking mask may further identify whether the UE is permitted to useeach antenna for transmission and/or reception on communication link 1during transmission of an SRS on communication link 2. The blanking maskmay further identify what frequency bands upon which the UE is permittedto transmit and/or receive during an SRS transmission on communicationlink 2.

The UE may prepare for a multi-request based joint retune between RAT 1on communication link 1 and RAT 2 on communication link 2 to configurean antenna switched diversity configuration based at least in part onthe selected antennas and the blanking mask. The UE may provide thesignal path for communication link 1 a transmit antenna configurationand a receive antenna configuration to tune communication link 1. The UEmay provide the signal path for communication link 2 a transmit antennaconfiguration and a receive antenna configuration to tune communicationlink 2. The UE may provide the signal path for communication link 2 anSRS alternative path for SRS antenna-switching. The UE may provide thesignal path for communication link 2 the blanking mask for blankingduring SRS transmission.

In some aspects, the UE may implement a hysteresis timer to preventfrequent switching between antenna selection being prioritized forcommunication link 1 and antenna selection being prioritized forcommunication link 2. In these examples, after switching between antennaselection being prioritized for communication link 1 and antennaselection being prioritized for communication link 2, the UE may refrainfrom switching antenna selection priority between communication link 1and communication link 2 again for a configured time period.

In this way, the UE is capable of prioritizing the antennas across aplurality of communication links in a dual connectivity configuration(as well as in multi-connectivity configurations including three or morecommunication links). This enables the UE to select preferred antennasand/or antenna switched diversity configurations to increase coverage,increase performance, increase reliability, increase throughput, and/ordecrease latency in various communication and coverage scenarios.

As indicated above, FIG. 5 is provided as one or more examples. Otherexamples may differ from what is described with respect to FIG. 5 .

FIG. 6 is a diagram illustrating examples of transmit/receive blanking,in accordance with the present disclosure. In particular, FIG. 6 is adiagram illustrating example blanking masks for communication link 1using RAT 1 (e.g., an LTE RAT or another type of anchor RAT) that may beused for transmission/reception blanking during SRS transmissions oncommunication link 2 using RAT 2 (e.g., an NR RAT) in a dualconnectivity configuration. Other example blanking masks may be used(e.g., for NRDC).

As shown in FIG. 6 , example blanking mask 610, example blanking mask620, example blanking mask 630, and example blanking 640 may eachprovide an example blanking mask configuration for different transmitantenna selections for a communication link 1. In particular, exampleblanking mask 610 provides an example blanking mask configuration forantenna 1 of the UE's shared RF front-end, example blanking mask 620provides an example blanking mask configuration for antenna 2 of theUE's shared RF front-end, example blanking mask 630 provides an exampleblanking mask configuration for antenna 3 of the UE's shared RFfront-end, and example blanking mask 640 provides an example blankingmask configuration for antenna 4 of the UE's shared RF front-end.

As shown in FIG. 6 , in each of the example blanking masks 610-640, theUE is configured to refrain from transmitting and receiving oncommunication link 1 using RAT 1 during an SRS transmission on theantenna on which the SRS transmission is to be performed oncommunication link 2 using RAT 2. Moreover, in each of the exampleblanking masks 610-640, the UE may be permitted to transmit and/orreceive on communication link 1 using RAT 1 during an SRS transmissionon other antennas than the antenna on which the SRS transmission is tobe performed on communication link 2 using RAT 2. Moreover, each of theexample blanking masks 610-640 may specify the frequency bands on whichthe UE may transmit and/or receive on communication link 1 using RAT 1(e.g., Rx12, Rx13, Rx01, and/or the like).

As indicated above, FIG. 6 is provided as one or more examples. Otherexamples may differ from what is described with respect to FIG. 6 .

FIG. 7 is a diagram illustrating an example process 700 performed, forexample, by a UE, in accordance with the present disclosure. Exampleprocess 700 is an example where the UE (e.g., UE 120) performsoperations associated with techniques for UE antenna prioritization.

As shown in FIG. 7 , in some aspects, process 700 may includeestablishing a first communication link using a first RAT (block 710).For example, the UE (e.g., using link establishment component 808,depicted in FIG. 8 ) may establish a first communication link using afirst RAT, as described above.

As further shown in FIG. 7 , in some aspects, process 700 may includeestablishing a second communication link using a second RAT (block 720).For example, the UE (e.g., using link establishment component 808,depicted in FIG. 8 ) may establish a second communication link using asecond RAT, as described above.

As further shown in FIG. 7 , in some aspects, process 700 may includedetermining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT (block 730). For example, the UE (e.g., usingdetermination component 810, depicted in FIG. 8 ) may determine whetherto prioritize antenna selection for the first communication link usingthe first RAT or the second communication link using the second RAT, asdescribed above.

As further shown in FIG. 7 , in some aspects, process 700 may includeprioritizing antenna selection for the first communication link or thesecond communication link based at least in part on the determination(block 740). For example, the UE (e.g., using prioritization component812, depicted in FIG. 8 ) may prioritize antenna selection for the firstcommunication link or the second communication link based at least inpart on the determination, as described above.

Process 700 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, process 700 includes operating in a standalone modeon the first communication link using the first RAT, whereinestablishing the second communication link comprises establishing thesecond communication link using the second RAT to establish a dualconnectivity configuration, and wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises determining to prioritize antenna selection for the firstcommunication link using the first RAT as an initial configuration forthe dual connectivity configuration. In a second aspect, alone or incombination with the first aspect, the dual connectivity configurationcomprises an ENDC configuration or an NRDC configuration. In a thirdaspect, alone or in combination with one or more of the first and secondaspects, determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT based at least inpart on one or more antenna prioritization parameters.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that at least asubset of the one or more antenna prioritization parameters aresatisfied. In a fifth aspect, alone or in combination with one or moreof the first through fourth aspects, determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT comprisesdetermining to prioritize antenna selection for the second communicationlink using the second RAT based at least in part on a determination thatat least a subset of the one or more antenna prioritization parametersare not satisfied.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, the one or more antenna prioritization parametersinclude at least one of a service type associated with the firstcommunication link, a signal measurement associated with the firstcommunication link, or a difference in signal measurements between atransmit antenna for the first communication link and a non-transmitantenna for the first communication link. In a seventh aspect, alone orin combination with one or more of the first through sixth aspects,determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT comprises determining to prioritize antennaselection for the first communication link using the first RAT based atleast in part on the service type associated with the firstcommunication link being a VoLTE service or a VoNR service.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that the signalmeasurement associated with the first communication link does notsatisfy a threshold. In a ninth aspect, alone or in combination with oneor more of the first through eighth aspects, determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises determining to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link satisfies a threshold.

In a tenth aspect, alone or in combination with one or more of the firstthrough ninth aspects, determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises determining toprioritize antenna selection for the first communication link using thefirst RAT based at least in part on a determination that the differencein signal measurements between the transmit antenna for the firstcommunication link and the non-transmit antenna for the firstcommunication link satisfies a threshold. In an eleventh aspect, aloneor in combination with one or more of the first through tenth aspects,determining whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT comprises determining to prioritize antennaselection for the second communication link using the second RAT basedat least in part on a determination that the difference in signalmeasurements between the transmit antenna for the first communicationlink and the non-transmit antenna for the first communication link doesnot satisfy a threshold.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT comprisesdetermining to prioritize antenna selection for the first communicationlink using the first RAT, and wherein the method further comprisesselecting a first transmit antenna, of a plurality of antennas of theUE, for the first communication link, and selecting a second transmitantenna, of the plurality of antennas, for the second communicationlink, after selecting the first transmit antenna for the firstcommunication link. In a thirteenth aspect, alone or in combination withone or more of the first through twelfth aspects, selecting the firsttransmit antenna for the first communication link comprises selecting,as the first transmit antenna, a preferred transmit antenna for thefirst communication link.

In a fourteenth aspect, alone or in combination with one or more of thefirst through thirteenth aspects, selecting the second transmit antennafor the second communication link after selecting the first transmitantenna for the first communication comprises selecting, as the secondtransmit antenna, a remaining antenna of the plurality of antennas forthe first communication link, wherein the remaining antenna is differentfrom the preferred transmit antenna. In a fifteenth aspect, alone or incombination with one or more of the first through fourteenth aspects,process 700 includes determining an SRS alternative path for the secondtransmit antenna, and determining a blanking mask for the firstcommunication link on the first transmit antenna based at least in parton the SRS alternative path for the second transmit antenna.

In a sixteenth aspect, alone or in combination with one or more of thefirst through fifteenth aspects, process 700 includes refraining fromswitching antenna selection priority between the first communicationlink and the second communication link for a configured time period fromdetermining to prioritize antenna selection for the first communicationlink. In a seventeenth aspect, alone or in combination with one or moreof the first through sixteenth aspects, determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises determining to prioritize antenna selection for the secondcommunication link using the second RAT, and wherein the method furthercomprises selecting a first transmit antenna of a plurality of antennasfor the UE for the second RAT, and selecting a second transmit antennaof the plurality of antennas for the first RAT after selecting thesecond transmit antenna for the second RAT.

In an eighteenth aspect, alone or in combination with one or more of thefirst through seventeenth aspects, selecting the first transmit antennafor the second communication link comprises selecting, as the firsttransmit antenna, a preferred transmit antenna for the secondcommunication link. In a nineteenth aspect, alone or in combination withone or more of the first through eighteenth aspects, selecting thesecond transmit antenna for the first communication link after selectingthe first transmit antenna for the second communication link comprisesselecting, as the second transmit antenna, a remaining antenna of theplurality of antennas for the second communication link, wherein theremaining antenna is different from the preferred transmit antenna.

In a twentieth aspect, alone or in combination with one or more of thefirst through nineteenth aspects, process 700 includes determining anSRS alternative path for the second transmit antenna, and determining ablanking mask for the first communication link on the first transmitantenna based at least in part on the SRS alternative path for thesecond transmit antenna. In a twenty-first aspect, alone or incombination with one or more of the first through twentieth aspects,process 700 includes refraining from switching antenna selectionpriority between the first communication link and the secondcommunication link for a configured time period from determining toprioritize antenna selection for the second communication link.

In a twenty-second aspect, alone or in combination with one or more ofthe first through twenty-first aspects, the first RAT comprises an LTERAT and the second RAT comprises an NR RAT. In a twenty-third aspect,alone or in combination with one or more of the first throughtwenty-second aspects, the first RAT and the second RAT share an RFfront-end of the UE.

In a twenty-fourth aspect, alone or in combination with one or more ofthe first through twenty-third aspects, determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link does not satisfy a threshold. In a twenty-fifthaspect, alone or in combination with one or more of the first throughtwenty-fourth aspects, determining whether to prioritize antennaselection for the first communication link using the first RAT or thesecond communication link using the second RAT comprises determining toprioritize antenna selection for the second communication link using thesecond RAT based at least in part on a determination that the signalmeasurement associated with the first communication link satisfies athreshold.

Although FIG. 7 shows example blocks of process 700, in some aspects,process 700 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 7 .Additionally, or alternatively, two or more of the blocks of process 700may be performed in parallel.

FIG. 8 is a block diagram of an example apparatus 800 for wirelesscommunication. The apparatus 800 may be a UE, or a UE may include theapparatus 800. In some aspects, the apparatus 800 includes a receptioncomponent 802 and a transmission component 804, which may be incommunication with one another (for example, via one or more busesand/or one or more other components). As shown, the apparatus 800 maycommunicate with another apparatus 806 (such as a UE, a base station, oranother wireless communication device) using the reception component 802and the transmission component 804. As further shown, the apparatus 800may include one or more of a link establishment component 808, adetermination component 810, or a prioritization component 812, amongother examples.

In some aspects, the apparatus 800 may be configured to perform one ormore operations described herein in connection with FIGS. 5 and/or 6 .Additionally, or alternatively, the apparatus 800 may be configured toperform one or more processes described herein, such as process 700 ofFIG. 7 . In some aspects, the apparatus 800 and/or one or morecomponents shown in FIG. 8 may include one or more components of the UEdescribed above in connection with FIG. 2 . Additionally, oralternatively, one or more components shown in FIG. 8 may be implementedwithin one or more components described above in connection with FIG. 2. Additionally, or alternatively, one or more components of the set ofcomponents may be implemented at least in part as software stored in amemory. For example, a component (or a portion of a component) may beimplemented as instructions or code stored in a non-transitorycomputer-readable medium and executable by a controller or a processorto perform the functions or operations of the component.

The reception component 802 may receive communications, such asreference signals, control information, data communications, or acombination thereof, from the apparatus 806. The reception component 802may provide received communications to one or more other components ofthe apparatus 800. In some aspects, the reception component 802 mayperform signal processing on the received communications (such asfiltering, amplification, demodulation, analog-to-digital conversion,demultiplexing, deinterleaving, de-mapping, equalization, interferencecancellation, or decoding, among other examples), and may provide theprocessed signals to the one or more other components of the apparatus806. In some aspects, the reception component 802 may include one ormore antennas, a demodulator, a MIMO detector, a receive processor, acontroller/processor, a memory, or a combination thereof, of the UEdescribed above in connection with FIG. 2 .

The transmission component 804 may transmit communications, such asreference signals, control information, data communications, or acombination thereof, to the apparatus 806. In some aspects, one or moreother components of the apparatus 806 may generate communications andmay provide the generated communications to the transmission component804 for transmission to the apparatus 806. In some aspects, thetransmission component 804 may perform signal processing on thegenerated communications (such as filtering, amplification, modulation,digital-to-analog conversion, multiplexing, interleaving, mapping, orencoding, among other examples), and may transmit the processed signalsto the apparatus 806. In some aspects, the transmission component 804may include one or more antennas, a modulator, a transmit MIMOprocessor, a transmit processor, a controller/processor, a memory, or acombination thereof, of the UE described above in connection with FIG. 2. In some aspects, the transmission component 804 may be co-located withthe reception component 802 in a transceiver.

The link establishment component 808 may establish a first communicationlink using a first RAT. The link establishment component 808 mayestablish a second communication link using a second RAT. In someaspects, the link establishment component 808 may include one or moreantennas, a demodulator, a MIMO detector, a receive processor, amodulator, a transmit MIMO processor, a transmit processor, acontroller/processor, a memory, or a combination thereof, of the UEdescribed above in connection with FIG. 2 . The determination component810 may determine whether to prioritize antenna selection for the firstcommunication link using the first RAT or the second communication linkusing the second RAT. In some aspects, the determination component 810may include a receive processor, a transmit processor, acontroller/processor, a memory, or a combination thereof, of the UEdescribed above in connection with FIG. 2 . The prioritization component812 may prioritize antenna selection for the first communication link orthe second communication link based at least in part on thedetermination. In some aspects, the prioritization component 812 mayinclude one or more antennas, a demodulator, a MIMO detector, a receiveprocessor, a modulator, a transmit MIMO processor, a transmit processor,a controller/processor, a memory, or a combination thereof, of the UEdescribed above in connection with FIG. 2 .

The reception component 802 and/or the transmission component 804 mayoperate in a standalone mode on the first communication link using thefirst RAT. The determination component 810 may determine an SRSalternative path for the second transmit antenna. The determinationcomponent 810 may determine a blanking mask for the first communicationlink on the first transmit antenna based at least in part on the SRSalternative path for the second transmit antenna. The prioritizationcomponent 812 may refrain from switching antenna selection prioritybetween the first communication link and the second communication linkfor a configured time period from determining to prioritize antennaselection for the first communication link.

The determination component 810 may determine an SRS alternative pathfor the second transmit antenna. The determination component 810 maydetermine a blanking mask for the first communication link on the firsttransmit antenna based at least in part on the SRS alternative path forthe second transmit antenna. The prioritization component 812 mayrefrain from switching antenna selection priority between the firstcommunication link and the second communication link for a configuredtime period from determining to prioritize antenna selection for thesecond communication link.

The number and arrangement of components shown in FIG. 8 are provided asan example. In practice, there may be additional components, fewercomponents, different components, or differently arranged componentsthan those shown in FIG. 8 . Furthermore, two or more components shownin FIG. 8 may be implemented within a single component, or a singlecomponent shown in FIG. 8 may be implemented as multiple, distributedcomponents. Additionally, or alternatively, a set of (one or more)components shown in FIG. 8 may perform one or more functions describedas being performed by another set of components shown in FIG. 8 .

FIG. 9 is a block diagram of an example apparatus 900 for wirelesscommunication. The apparatus 900 may be a base station, or a basestation may include the apparatus 900. In some aspects, the apparatus900 includes a reception component 902 and a transmission component 904,which may be in communication with one another (for example, via one ormore buses and/or one or more other components). As shown, the apparatus900 may communicate with another apparatus 906 (such as a UE, a basestation, or another wireless communication device) using the receptioncomponent 902 and the transmission component 904.

In some aspects, the apparatus 900 may be configured to perform one ormore operations described herein in connection with FIGS. 5 and 6 .Additionally, or alternatively, the apparatus 900 may be configured toperform one or more processes described herein. In some aspects, theapparatus 900 and/or one or more components shown in FIG. 9 may includeone or more components of the base station described above in connectionwith FIG. 2 . Additionally, or alternatively, one or more componentsshown in FIG. 9 may be implemented within one or more componentsdescribed above in connection with FIG. 2 . Additionally, oralternatively, one or more components of the set of components may beimplemented at least in part as software stored in a memory. Forexample, a component (or a portion of a component) may be implemented asinstructions or code stored in a non-transitory computer-readable mediumand executable by a controller or a processor to perform the functionsor operations of the component.

The reception component 902 may receive communications, such asreference signals, control information, data communications, or acombination thereof, from the apparatus 906. The reception component 902may provide received communications to one or more other components ofthe apparatus 900. In some aspects, the reception component 902 mayperform signal processing on the received communications (such asfiltering, amplification, demodulation, analog-to-digital conversion,demultiplexing, deinterleaving, de-mapping, equalization, interferencecancellation, or decoding, among other examples), and may provide theprocessed signals to the one or more other components of the apparatus906. In some aspects, the reception component 902 may include one ormore antennas, a demodulator, a MIMO detector, a receive processor, acontroller/processor, a memory, or a combination thereof, of the basestation described above in connection with FIG. 2 .

The transmission component 904 may transmit communications, such asreference signals, control information, data communications, or acombination thereof, to the apparatus 906. In some aspects, one or moreother components of the apparatus 906 may generate communications andmay provide the generated communications to the transmission component904 for transmission to the apparatus 906. In some aspects, thetransmission component 904 may perform signal processing on thegenerated communications (such as filtering, amplification, modulation,digital-to-analog conversion, multiplexing, interleaving, mapping, orencoding, among other examples), and may transmit the processed signalsto the apparatus 906. In some aspects, the transmission component 904may include one or more antennas, a modulator, a transmit MIMOprocessor, a transmit processor, a controller/processor, a memory, or acombination thereof, of the base station described above in connectionwith FIG. 2 . In some aspects, the transmission component 904 may beco-located with the reception component 902 in a transceiver.

The number and arrangement of components shown in FIG. 9 are provided asan example. In practice, there may be additional components, fewercomponents, different components, or differently arranged componentsthan those shown in FIG. 9 . Furthermore, two or more components shownin FIG. 9 may be implemented within a single component, or a singlecomponent shown in FIG. 9 may be implemented as multiple, distributedcomponents. Additionally, or alternatively, a set of (one or more)components shown in FIG. 9 may perform one or more functions describedas being performed by another set of components shown in FIG. 9 .

The following provides an overview of some Aspects of the presentdisclosure:

Aspect 1: A method of wireless communication performed by a userequipment (UE), comprising: establishing a first communication linkusing a first radio access technology (RAT); establishing a secondcommunication link using a second RAT; determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT; and prioritizingantenna selection for the first communication link or the secondcommunication link based at least in part on the determination.

Aspect 2: The method of Aspect 1, further comprising: operating in astandalone mode on the first communication link using the first RAT;wherein establishing the second communication link comprises:establishing the second communication link using the second RAT toestablish a dual connectivity configuration; and wherein determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises: determining to prioritize antenna selection for the firstcommunication link using the first RAT as an initial configuration forthe dual connectivity configuration. wherein establishing the secondcommunication link comprises: establishing the second communication linkusing the second RAT to establish a dual connectivity configuration; andwherein determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises: determining to prioritize antennaselection for the first communication link using the first RAT as aninitial configuration for the dual connectivity configuration.

Aspect 3: The method of Aspect 2, wherein the dual connectivityconfiguration comprises an Evolved Universal Mobile TelecommunicationsSystem Terrestrial Radio Access Network (E-UTRAN) NR dual connectivity(ENDC) configuration, or wherein the dual connectivity configurationcomprises a New Radio dual connectivity (NRDC) configuration. Aspect 4:The method of any of Aspects 1-3, wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises: determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises based at least in part on one ormore antenna prioritization parameters. Aspect 5: The method of Aspect4, wherein determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises: determining to prioritize antennaselection for the first communication link using the first RAT based atleast in part on a determination that at least a subset of the one ormore antenna prioritization parameters are satisfied.

Aspect 6: The method of Aspect 4, wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises: determining to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that at least a subset of the one or more antennaprioritization parameters are not satisfied.

Aspect 7: The method of any of Aspects 4-6, wherein the one or moreantenna prioritization parameters include at least one of: a servicetype associated with the first communication link, a signal measurementassociated with the first communication link, or a difference in signalmeasurements between a transmit antenna for the first communication linkand a non-transmit antenna for the first communication link. Aspect 8:The method of Aspect 7, wherein determining whether to prioritizeantenna selection for the first communication link using the first RATor the second communication link using the second RAT comprises:determining to prioritize antenna selection for the first communicationlink using the first RAT based at least in part on the service typeassociated with the first communication link being a voice over LongTerm Evolution (VoLTE) service or a voice over New Radio (VoNR) service.Aspect 9: The method of Aspect 7 or 8, wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises: determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link does not satisfy a threshold.

Aspect 10: The method of Aspect 7 or 8, wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises: determining to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the signal measurement associated with the firstcommunication link satisfies a threshold.

Aspect 11: The method of any of Aspects 7-10, wherein determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises: determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that the difference in signal measurements between thetransmit antenna for the first communication link and the non-transmitantenna for the first communication link satisfies a threshold. Aspect12: The method of any of Aspects 7-11, wherein determining whether toprioritize antenna selection for the first communication link using thefirst RAT or the second communication link using the second RATcomprises: determining to prioritize antenna selection for the secondcommunication link using the second RAT based at least in part on adetermination that the difference in signal measurements between thetransmit antenna for the first communication link and the non-transmitantenna for the first communication link does not satisfy a threshold.

Aspect 13: The method of any of Aspects 1-12, wherein determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises: determining to prioritize antenna selection for the firstcommunication link using the first RAT; and wherein the method furthercomprises: selecting a first transmit antenna, of a plurality ofantennas of the UE, for the first communication link; and selecting asecond transmit antenna, of the plurality of antennas, for the secondcommunication link, after selecting the first transmit antenna for thefirst communication link. Aspect 14: The method of Aspect 13, whereinselecting the first transmit antenna for the first communication linkcomprises: selecting, as the first transmit antenna, a preferredtransmit antenna for the first communication link.

Aspect 15: The method of Aspect 14, wherein selecting the secondtransmit antenna for the second communication link after selecting thefirst transmit antenna for the first communication comprises: selecting,as the second transmit antenna, a remaining antenna of the plurality ofantennas for the second communication link, wherein the remainingantenna is different from the preferred transmit antenna. Aspect 16: Themethod of Aspect 15, further comprising: determining a soundingreference signal (SRS) alternative path for the second transmit antenna;and determining a blanking mask for the first communication link on thefirst transmit antenna based at least in part on the SRS alternativepath for the second transmit antenna.

Aspect 17: The method of any of Aspects 13-16, further comprising:refraining from switching antenna selection priority between the firstcommunication link and the second communication link for a configuredtime period from determining to prioritize antenna selection for thefirst communication link. Aspect 18: The method of any of Aspects 1-17,wherein determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises: determining to prioritize antennaselection for the second communication link using the second RAT; andwherein the method further comprises: selecting a first transmit antennaof a plurality of antennas of the UE for the second RAT; and selecting asecond transmit antenna of the plurality of antennas for the first RATafter selecting the first transmit antenna for the second RAT.

Aspect 19: The method of Aspect 18, wherein selecting the first transmitantenna for the second communication link comprises: selecting, as thefirst transmit antenna, a preferred transmit antenna for the firstcommunication link. Aspect 20: The method of Aspect 19, whereinselecting the second transmit antenna for the first communication linkafter selecting the first transmit antenna for the second communicationlink comprises: selecting, as the second transmit antenna, a remainingantenna of the plurality of antennas for the second communication link,wherein the remaining antenna is different from the preferred transmitantenna. Aspect 21: The method of Aspect 20, further comprising:determining a sounding reference signal (SRS) alternative path for thefirst transmit antenna; and determining a blanking mask for the firstcommunication link on the second transmit antenna based at least in parton the SRS alternative path for the first transmit antenna.

Aspect 22: The method of any of Aspects 19 to 21, further comprising:refraining from switching antenna selection priority between the firstcommunication link and the second communication link for a configuredtime period from determining to prioritize antenna selection for thesecond communication link. Aspect 23: The method of any of Aspects 1-22,wherein the first RAT comprises a Long Term Evolution (LTE) RAT; andwherein the second RAT comprises a New Radio (NR) RAT. Aspect 24: Themethod of any of Aspects 1-23, wherein the first RAT and the second RATshare a radio frequency (RF) front-end of the UE.

Aspect 25: The method of any of Aspects 1-24, wherein determiningwhether to prioritize antenna selection for the first communication linkusing the first RAT or the second communication link using the secondRAT comprises: determining to prioritize antenna selection for the firstcommunication link using the first RAT based at least in part on adetermination that a second highest reference signal received power(RSRP) measurement associated with the first communication link does notsatisfy a threshold. Aspect 26: The method of any of Aspects 1-24,wherein determining whether to prioritize antenna selection for thefirst communication link using the first RAT or the second communicationlink using the second RAT comprises: determining to prioritize antennaselection for the second communication link using the second RAT basedat least in part on a determination that a second highest referencesignal received power (RSRP) measurement associated with the firstcommunication link satisfies a threshold.

Aspect 27: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more Aspects ofAspects 1-26. Aspect 28: A device for wireless communication, comprisinga memory and one or more processors coupled to the memory, the memoryand the one or more processors configured to perform the method of oneor more Aspects of Aspects 1-26.

Aspect 29: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more Aspects of Aspects1-26. Aspect 30: A non-transitory computer-readable medium storing codefor wireless communication, the code comprising instructions executableby a processor to perform the method of one or more Aspects of Aspects1-26. Aspect 31: A non-transitory computer-readable medium storing a setof instructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore Aspects of Aspects 1-26.

The foregoing disclosure provides illustration and description, but isnot intended to be exhaustive or to limit the aspects to the preciseforms disclosed. Modifications and variations may be made in light ofthe above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construedas hardware, firmware, and/or a combination of hardware and software. Asused herein, a processor is implemented in hardware, firmware, and/or acombination of hardware and software. It will be apparent that systemsand/or methods described herein may be implemented in different forms ofhardware, firmware, and/or a combination of hardware and software. Theactual specialized control hardware or software code used to implementthese systems and/or methods is not limiting of the aspects. Thus, theoperation and behavior of the systems and/or methods were describedherein without reference to specific software code—it being understoodthat software and hardware can be designed to implement the systemsand/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context,refer to a value being greater than the threshold, greater than or equalto the threshold, less than the threshold, less than or equal to thethreshold, equal to the threshold, not equal to the threshold, or thelike.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of various aspects. In fact, many ofthese features may be combined in ways not specifically recited in theclaims and/or disclosed in the specification. Although each dependentclaim listed below may directly depend on only one claim, the disclosureof various aspects includes each dependent claim in combination withevery other claim in the claim set. As used herein, a phrase referringto “at least one of” a list of items refers to any combination of thoseitems, including single members. As an example, “at least one of: a, b,or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well asany combination with multiples of the same element (e.g., a-a, a-a-a,a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or anyother ordering of a, b, and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems and may be used interchangeably with “one or more.” Further, asused herein, the article “the” is intended to include one or more itemsreferenced in connection with the article “the” and may be usedinterchangeably with “the one or more.” Furthermore, as used herein, theterms “set” and “group” are intended to include one or more items (e.g.,related items, unrelated items, or a combination of related andunrelated items), and may be used interchangeably with “one or more.”Where only one item is intended, the phrase “only one” or similarlanguage is used. Also, as used herein, the terms “has,” “have,”“having,” or the like are intended to be open-ended terms. Further, thephrase “based on” is intended to mean “based, at least in part, on”unless explicitly stated otherwise. Also, as used herein, the term “or”is intended to be inclusive when used in a series and may be usedinterchangeably with “and/or,” unless explicitly stated otherwise (e.g.,if used in combination with “either” or “only one of”).

What is claimed is:
 1. A user equipment (UE), comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: establish a first communication link using a first radio access technology (RAT); establish a second communication link using a second RAT; determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a service type associated with the first communication link being a voice over Long Term Evolution (VoLTE) service or a voice over New Radio (VoNR) service; and prioritize antenna selection for the first communication link or the second communication link based at least in part on the determination of whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT.
 2. The UE of claim 1, wherein the one or more processors are further configured to: operate in a standalone mode on the first communication link using the first RAT; wherein the one or more processors, to establish the second communication link, are configured to: establish the second communication link using the second RAT to establish a dual connectivity configuration; and wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT as an initial configuration for the dual connectivity configuration.
 3. The UE of claim 2, wherein the dual connectivity configuration comprises an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN) NR dual connectivity (ENDC) configuration, or wherein the dual connectivity configuration comprises a New Radio dual connectivity (NRDC) configuration.
 4. The UE of claim 1, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT based at least in part on one or more antenna prioritization parameters.
 5. The UE of claim 4, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that at least a subset of the one or more antenna prioritization parameters are satisfied.
 6. The UE of claim 4, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that at least a subset of the one or more antenna prioritization parameters are not satisfied.
 7. The UE of claim 4, wherein the one or more antenna prioritization parameters include at least one of: the service type associated with the first communication link, a signal measurement associated with the first communication link, or a difference in signal measurements between a transmit antenna for the first communication link and a non-transmit antenna for the first communication link.
 8. The UE of claim 7, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that the signal measurement associated with the first communication link does not satisfy a threshold.
 9. The UE of claim 7, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the signal measurement associated with the first communication link satisfies a threshold.
 10. The UE of claim 7, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that the difference in signal measurements between the transmit antenna for the first communication link and the non-transmit antenna for the first communication link satisfies a threshold, or determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the difference in signal measurements between the transmit antenna for the first communication link and the non-transmit antenna for the first communication link does not satisfy the threshold.
 11. The UE of claim 1, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT; and wherein the one or more processors are further configured to: select a first transmit antenna, of a plurality of antennas of the UE, for the first communication link; and select a second transmit antenna, of the plurality of antennas, for the second communication link, after selecting the first transmit antenna for the first communication link.
 12. The UE of claim 11, wherein the one or more processors, to select the first transmit antenna for the first communication link, are configured to: select, as the first transmit antenna, a preferred transmit antenna for the first communication link.
 13. The UE of claim 12, wherein selecting the one or more processors, to select the second transmit antenna for the second communication link after selecting the first transmit antenna for the first communication link, are configured to: select, as the second transmit antenna, a remaining antenna of the plurality of antennas for the second communication link, wherein the remaining antenna is different from the preferred transmit antenna.
 14. The UE of claim 11, wherein the one or more processors are further configured to: determine a sounding reference signal (SRS) alternative path for the second transmit antenna; and determine a blanking mask for the first communication link on the first transmit antenna based at least in part on the SRS alternative path for the second transmit antenna.
 15. The UE of claim 11, wherein the one or more processors are further configured to: refrain from switching antenna selection priority between the first communication link and the second communication link for a configured time period from determining to prioritize antenna selection for the first communication link.
 16. The UE of claim 1, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the second communication link using the second RAT; and wherein the one or more processors are further configured to: select a first transmit antenna of a plurality of antennas of the UE for the second RAT; and select a second transmit antenna of the plurality of antennas for the first RAT after selecting the first transmit antenna for the second RAT.
 17. The UE of claim 16, wherein the one or more processors, to select the first transmit antenna for the second communication link, are configured to: select, as the first transmit antenna, a preferred transmit antenna for the second communication link.
 18. The UE of claim 17, wherein the one or more processors, to select the second transmit antenna for the first communication link after selecting the first transmit antenna for the second communication link, are configured to: select, as the second transmit antenna, a remaining antenna of the plurality of antennas for the first communication link, wherein the remaining antenna is different from the preferred transmit antenna.
 19. The UE of claim 18, wherein the one or more processors are further configured to: determine a sounding reference signal (SRS) alternative path for the first transmit antenna; and determine a blanking mask for the first communication link on the second transmit antenna based at least in part on the SRS alternative path for the first transmit antenna.
 20. The UE of claim 17, wherein the one or more processors are further configured to: refrain from switching antenna selection priority between the first communication link and the second communication link for a configured time period from determining to prioritize antenna selection for the second communication link.
 21. The UE of claim 1, wherein the first RAT comprises a Long Term Evolution (LTE) RAT; and wherein the second RAT comprises a New Radio (NR) RAT.
 22. The UE of claim 1, wherein the first RAT and the second RAT share a radio frequency (RF) front-end of the UE.
 23. The UE of claim 1, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that a second highest reference signal received power (RSRP) measurement associated with the first communication link does not satisfy a threshold, or determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the second highest RSRP measurement associated with the first communication link satisfies the threshold.
 24. A method of wireless communication performed by user equipment (UE), comprising: establishing a first communication link using a first radio access technology (RAT); establishing a second communication link using a second RAT; determining to prioritize antenna selection for the first communication link using the first RAT based at least in part on a service type associated with the first communication link being a voice over Long Term Evolution (VoLTE) service or a voice over New Radio (VoNR) service; and prioritizing antenna selection for the first communication link based at least in part on the determination.
 25. The method of claim 24, wherein the first RAT and the second RAT share a radio frequency (RF) front-end of the UE.
 26. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: establish a first communication link using a first radio access technology (RAT); establish a second communication link using a second RAT; determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a service type associated with the first communication link being a voice over Long Term Evolution (VoLTE) service or a voice over New Radio (VoNR) service; and prioritize antenna selection for the first communication link based at least in part on the determination.
 27. The non-transitory computer-readable medium of claim 26, wherein the first RAT and the second RAT share a radio frequency (RF) front-end of the UE.
 28. An apparatus for wireless communication, comprising: means for establishing a first communication link using a first radio access technology (RAT); means for establishing a second communication link using a second RAT; means for determining to prioritize antenna selection for the first communication link using the first RAT based at least in part on a service type associated with the first communication link being a voice over Long Term Evolution (VoLTE) service or a voice over New Radio (VoNR) service; and means for prioritizing antenna selection for the first communication link based at least in part on the determination.
 29. The apparatus of claim 28, wherein the first RAT and the second RAT share a radio frequency (RF) front-end of the apparatus.
 30. A user equipment (UE), comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: establish a first communication link using a first radio access technology (RAT); establish a second communication link using a second RAT; determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that a difference in signal measurements between a transmit antenna for the first communication link and a non-transmit antenna for the first communication link satisfies a threshold, or determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the difference in signal measurements between the transmit antenna for the first communication link and the non-transmit antenna for the first communication link does not satisfy the threshold; and prioritize antenna selection for the first communication link or the second communication link based at least in part on the determination of whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT.
 31. A method of wireless communication performed by a user equipment (UE), comprising: establishing a first communication link using a first radio access technology (RAT); establishing a second communication link using a second RAT; determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, wherein determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT comprises: determining to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that a difference in signal measurements between a transmit antenna for the first communication link and a non-transmit antenna for the first communication link satisfies a threshold, or determining to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the difference in signal measurements between the transmit antenna for the first communication link and the non-transmit antenna for the first communication link does not satisfy the threshold; and prioritizing antenna selection for the first communication link or the second communication link based at least in part on determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT.
 32. A user equipment (UE), comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: establish a first communication link using a first radio access technology (RAT); establish a second communication link using a second RAT; determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT; prioritize antenna selection for the first communication link or the second communication link based at least in part on the determination; determine, based on the first communication link being prioritized, a sounding reference signal (SRS) alternative path for a first transmit antenna for the second communication link; and determine a blanking mask for the first communication link on a second transmit antenna for the first communication link based at least in part on the SRS alternative path for the first transmit antenna.
 33. A method of wireless communication performed by a user equipment (UE), comprising: establishing a first communication link using a first radio access technology (RAT); establishing a second communication link using a second RAT; determining to prioritize antenna selection for the first communication link using the first RAT; prioritizing antenna selection for the first communication link based at least in part on the determination; determining, based on prioritizing the first communication link, a sounding reference signal (SRS) alternative path for a first transmit antenna for the second communication link; and determining a blanking mask for the first communication link on a second transmit antenna for the first communication link based at least in part on the SRS alternative path for the first transmit antenna.
 34. A user equipment (UE), comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: establish a first communication link using a first radio access technology (RAT); establish a second communication link using a second RAT; determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, wherein the one or more processors, to determine whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, are configured to: determine to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that a second highest reference signal received power (RSRP) measurement associated with the first communication link does not satisfy a threshold, or determine to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the second highest RSRP measurement associated with the first communication link satisfies the threshold; and prioritize antenna selection for the first communication link or the second communication link based at least in part on the determination of whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT.
 35. A method of wireless communication performed by a user equipment (UE), comprising: establishing a first communication link using a first radio access technology (RAT); establishing a second communication link using a second RAT; determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT, wherein determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT comprises: determining to prioritize antenna selection for the first communication link using the first RAT based at least in part on a determination that a second highest reference signal received power (RSRP) measurement associated with the first communication link does not satisfy a threshold, or determining to prioritize antenna selection for the second communication link using the second RAT based at least in part on a determination that the second highest RSRP measurement associated with the first communication link satisfies the threshold; and prioritizing antenna selection for the first communication link or the second communication link based at least in part on determining whether to prioritize antenna selection for the first communication link using the first RAT or the second communication link using the second RAT. 